Mortal Shell 2 Build Planner
Plan a full Mortal Shell 2 build in four steps — shell, weapons, tarstones, seal — with live synergy notes and a shareable link. Updated for Hotfix 1.000.012; no build data changed since the 1.000.011 Adaptive Difficulty UI update. No account needed; your build lives in the URL.
Use the planner as your build and level calculator — plan tarstone levels 1-4 and Tarforge upgrade costs.
Why use a build planner for Mortal Shell 2
A quick look at what the build planner does and why it saves you time in-game.
Mortal Shell 2 runs on Unreal Engine 5 across PC, PS5, Xbox, and Steam Deck, and its loadout system has enough moving parts that planning off-screen pays off fast. The game ditches traditional stamina in favor of a Durability HP plus Resolve resource system, which means your shell choice, weapon pairing, and tarstone loadout all interact in ways that are not immediately obvious. A build planner lets you experiment with those combinations without burning rare upgrade materials or respeccing in the middle of a boss fight. Every serious player benefits from having a build planner open on a second screen while they play.
With eight shells, roughly fifteen weapons, seventy-five tarstones spread across ten slots, and four distinct seals, the total number of possible loadouts is enormous. Our build planner narrows that space by showing you synergy notes in real time as you make each selection. Want to know whether Tiel's rogue-leaning stats pair well with a fast weapon and the Harden seal? The build planner flags that combination and suggests complementary tarstones. That kind of feedback loop is exactly what a good build planner should provide — no guesswork, no wasted upgrade stones.
Every build you save in the build planner generates a shareable URL. That means you can post a link on Discord or Reddit and anyone who clicks it sees your exact loadout in the planner, ready to tweak or copy. No account, no login — the build planner encodes everything into the URL itself. For a game like Mortal Shell 2 where patch balance changes can shift the meta overnight, having a fast, shareable build planner is a practical advantage.
Looking for a proven starting point instead of building from scratch? Our community-tested builds page ranks five full loadouts — including a Smert time-stop setup and a tank-focused wall — and every one loads straight into the planner below.
Load a preset build
Not sure where to start? Load one of five community-tested presets with one click — then tune every slot in the planner.
How the 4-step build planner works
A walkthrough of each stage in the build planner so you know what to expect.
The build planner follows the same sequence you would use in-game: pick a shell first, then lock in your main weapon and offhand, fill your ten tarstone slots, and finally choose a seal. Each step in the build planner narrows the options available in the next step. For example, once you select a shell, the build planner highlights weapon choices that complement that shell's baseline stats. When you slot a weapon, the build planner adjusts the tarstone suggestions to match the weapon's damage type and attack speed profile.
The four steps in the build planner are not strictly linear — you can jump back and change your shell at any point, and the build planner will recompute synergy notes and clear conflicting tarstone selections automatically. That flexibility is one reason the build planner works better than a static spreadsheet for Mortal Shell 2. The game's ten-slot tarstone system (four Support slots that apply globally, plus three per weapon and three per offhand for Ability, Combat, and Infusion categories) creates enough combinatorial depth that a live-updating build planner is almost essential for serious theorycrafting.
Throughout the build planner process, the right-hand summary panel updates in real time. It shows your current loadout at a glance, lists any synergy notes, and lets you copy a share link or reset the entire build planner to start fresh. The build planner is designed to feel fast — every dropdown change reflects instantly with no page reloads or loading spinners.
Boss fights are where a planned loadout pays off most — pair your build with our boss difficulty tier list to see which encounters punish unoptimized shells and weapons.
Pick your Shell
Understanding shell synergy in the build planner
Each of the eight shells in Mortal Shell 2 brings a distinct stat profile that shapes your entire loadout. Tiel is the rogue-style shell with high mobility and low durability — a natural fit for the build planner if you favor dodge-centric play. Eredrim tanks hits with high Durability HP, making it a solid pick in the build planner for players who prefer to absorb damage rather than avoid it. Genessa focuses on summoning mechanics, which community-reported data suggests scales with Resolve generation. Smert offers a time-stop ability that community testers describe as a short-duration freeze on nearby enemies, giving you an opening for heavy attacks — a high-skill option in the build planner that rewards precise timing.
Proxima is tuned for newcomers, with balanced stats and forgiving windows, which makes it an excellent starting point in the build planner if you are still learning Mortal Shell 2's combat flow. Sariel leans into sustain and self-healing, Lazlo is a defense-oriented tank variant that community-reported testing places slightly below Eredrim in raw HP but higher in damage reduction, and Gragu is the burst and critical-hit shell for players who want every swing to hit hard. The build planner accounts for all these differences when generating synergy notes, so switching shells in the build planner will surface new weapon and tarstone recommendations every time.
Choose weapons
Weapon pairing tips for the build planner
Mortal Shell 2 gives you a main weapon and an offhand slot, and the build planner treats them as separate entities with their own tarstone slots. Your main weapon determines your primary damage type and attack speed, while the offhand typically handles defense, parry timing, or utility. In the build planner, picking a fast main weapon like a dagger or curved sword pairs well with Tiel or Gragu, whereas a slow greatsword synergizes better with Eredrim or Lazlo where the extra durability buys you time for long wind-ups. The build planner flags these pairings in the synergy notes panel, so you do not have to memorize every interaction yourself.
Keep in mind that the build planner lists roughly fifteen weapons, and some community-reported pairings are still being tested as of Hotfix 2.0. If the build planner shows a weapon combination without a synergy note, that usually means community data has not yet confirmed a strong interaction — not that the pairing is bad. Use the build planner as a starting point, then test in-game and adjust. Switching weapons in the build planner is instant, so do not hesitate to try multiple setups before settling on one.
Slot Tarstones
Ten slots: 4 Support (global passives) + weapon and offhand each get Ability / Combat / Infusion. The picker lists every stone we've verified — see the Tarstones guide for locations and upgrade routes.
Tarstone slot strategy for your build planner
The tarstone system in Mortal Shell 2 is one of the deepest customization layers, and the build planner gives you all ten slots on a single screen so you can see the full picture at once. Your four Support slots apply passive bonuses that affect your entire character regardless of weapon — things like elemental resistance, health regeneration, or Resolve gain modifiers (values community-reported since no public numeric data exists yet). The build planner organizes all seventy-five verified tarstones by category so you can quickly find what you need.
Each weapon and offhand gets three dedicated slots in the build planner: Combat, Infusion, and Ability. Combat tarstones modify how your weapon behaves in direct engagements — think attack speed boosts, counter-damage bonuses, or stagger modifiers. Infusion stones change your damage type or add elemental effects, and critically, Infusion stones become permanent at max upgrade level, so the build planner warns you before you commit to a path you might regret. Ability tarstones unlock or enhance weapon arts and special moves. The build planner shows all of these options in categorized dropdowns, which beats scrolling through an unsorted in-game menu.
A practical tip for using the build planner: fill your Support slots first to establish your global baseline, then work through the weapon-specific slots based on what your build needs most. If you are running a burst build with Gragu, the build planner might suggest stacking Combat tarstones that boost critical-hit chance and an Infusion stone that adds bleed. If you are leaning into Sariel's sustain playstyle, the build planner will point you toward Support slots that increase healing and Resolve gain. The tarstone section of the build planner is where most of the fine-tuning happens, so take your time here.
Choose a Seal
Seal selection guide for the build planner
How the four seals change your playstyle and what the build planner recommends for each one.
The seal you pick in the build planner is the final piece of your loadout, and it has an outsized impact on how your build actually feels in combat. Mortal Shell 2 offers four seals: Guard, Harden, Parry, and Gloomslayer. Each seal redefines a core defensive mechanic, so your shell and weapon choices should inform which seal the build planner suggests.
Guard enhances your block capabilities, making it a natural fit in the build planner for Eredrim, Lazlo, or any high-durability shell where standing your ground is the strategy. Harden modifies the classic hardening mechanic from the first game — community-reported testing indicates it extends the hardening window but may reduce its damage reflection, which the build planner accounts for in its synergy notes. Parry rewards precise timing with stronger counterattacks, and the build planner typically pairs it with faster weapons and shells like Tiel or Gragu where the risk-reward ratio skews toward aggression. Gloomslayer is a situational seal that community data suggests provides bonuses against specific enemy types — the build planner will flag it when your tarstone loadout already leans into anti-boss or anti-elite damage.
When you reach Step 4 in the build planner, check the synergy notes panel on the right. The build planner cross-references your shell, weapons, and tarstones to recommend the seal that ties the whole loadout together. If the build planner shows a warning next to a seal option, that means your current tarstone or weapon setup may conflict with that seal's strengths. Heed those warnings — the build planner is designed to catch mismatches before you commit in-game.
Sharing and iterating on your build planner loadout
Copy a link, post it, tweak it — the build planner is built for rapid iteration.
Once your build planner loadout is complete, hit the Copy share link button. The build planner encodes your entire four-step configuration into the URL — shell, both weapons, all ten tarstone slots, and your seal. Anyone who opens that link in a browser sees the build planner pre-filled with your exact choices. This makes the build planner a powerful collaboration tool for Mortal Shell 2 communities. Post a link in your clan Discord, compare builds on Reddit, or keep a bookmark of your current build planner setup so you can return to it later.
Iterating is where the build planner really shines. Balance Patch 1 shifted several weapon damage profiles, and future patches will likely do the same. When that happens, you can open your saved build planner link, swap out the affected weapon or tarstone, and immediately see updated synergy notes. No starting from scratch — the build planner preserves everything else while you adjust. If you want to experiment with an entirely different approach, the Reset button in the build planner clears all four steps instantly.
The build planner runs entirely in your browser with no server-side storage. That lightweight approach is what makes this build planner so responsive — no loading screens, no server round-trips, just instant feedback on every change you make in the build planner. Your data never leaves your machine unless you choose to share a URL. That means the build planner is fast, private, and always available regardless of server status. For Mortal Shell 2 players who want a reliable, no-nonsense tool for loadout planning, this build planner covers the full loop from first pick to shared link.
Build Planner FAQ
Does the build planner save my progress?
The build planner encodes your configuration into the URL, not a server. Bookmark the page with your selections, or use the Copy share link button. Closing the tab loses unsaved changes, but the share link preserves everything.
Are the synergy notes based on developer data?
No. Shell and weapon stats have no public numeric source — synergy notes are based on community-reported testing verified across at least two independent sources. Values may shift with future patches, and the build planner updates accordingly.
Can I use the build planner on mobile?
Yes. The build planner is fully responsive. The layout stacks vertically on smaller screens, and all dropdowns and buttons remain accessible on touch devices.
What does the Infusion stone warning mean?
Infusion stones become permanent at max upgrade level in Mortal Shell 2 — a one-way commitment. The build planner warns you because planning Infusion choices before committing materials in-game prevents costly mistakes.
Why does the build planner show different synergy notes than another site?
Community testing is ongoing and different sources reach different conclusions. The build planner reflects the most consistent findings from multiple testers, but individual results may vary. If your in-game experience contradicts a note, the note needs updating — not your build.
Does the build planner work offline?
Once the page is loaded, yes. The build planner runs entirely in your browser with no server calls after the initial page load. Your data never leaves your machine.
Where these numbers come from
Shell and weapon stats in Mortal Shell 2 have no public text source — we use qualitative ratings (Low / Medium / High) verified across at least two community sources, and we label single-source details as community-reported. Exact numeric values may arrive with later patches; we'll add them once verifiable. Tarstone slots follow the in-game 10-slot structure (4 Support + 3 per weapon/offhand).
The build planner pulls all of its data from the same verified sources we use across the site. When the build planner shows a synergy note, that note is based on at least two independent community reports or community-reported testing. When the build planner cannot confirm a specific interaction — for example, whether a particular Infusion stone's bleed effect stacks with a weapon's innate bleed — the build planner will either omit that note or explicitly mark it as unconfirmed. We would rather the build planner stay silent on a detail than present speculation as fact.
Seal mechanics in the build planner are among the least documented aspects of Mortal Shell 2. Community-reported data on exact cooldown reductions, damage reflection percentages, and Gloomslayer's target-specific bonuses is still incomplete as of Hotfix 2.0. The build planner reflects the best available understanding and will update as more testing confirms or corrects these values. If you notice a discrepancy between the build planner and your in-game experience, the build planner's data is the thing that needs updating — let us know through the site's contact page and we will verify and push a correction.
Infusion stones in the build planner carry a special warning: they become permanent at max upgrade level. This is a one-way commitment in Mortal Shell 2, so the build planner marks Infusion choices clearly. The build planner does not track your in-game upgrade progress — it is a planning tool, not a save editor — so always double-check your Infusion decisions against your actual upgrade state before committing materials in-game.