Mortal Shell 2 Seals — Untarnished, Infinite, Vatra, Slayer
Quick answer: Use the Untarnished Seal as your default. Swap to the Infinite Seal once parry timing is consistent, and keep Vatra's Seal for single heavy hits. Equip the Slayer Seal only if you want an easier run and do not care about achievements.
Official promotional screenshot: Steam / Cold Symmetry / Playstack
All four Seals
| Seal | Where you get it | What it does | Launch ranking |
|---|---|---|---|
| Untarnished Seal | Prologue / default | Hold block; Perfect Guard deals Break. Best default for most of the game. | S for general play |
| Infinite Seal | Sester Genessa training in Marrow Keep | Tap-parry with a tighter window and more Break on success. | A if you can parry consistently |
| Vatra's Seal | Looted from Harros after the Tar Golem | Harden through one hit, including mid-swing. Strong vs single heavies. | B as a main Seal, A as a swap |
| Slayer Seal | Secret / difficulty item | Makes the game easier with extra stagger tools. Community guides report it disables achievements on the current save. | A only if you are not trophy hunting |
Rankings are use-case snapshots, not a patch-proof meta. Balance Patch 1 also lets you Guard while walking, which slightly improves Untarnished Seal repositioning.
Which Seal should you use?
- New players: Untarnished Seal until Marrow Keep systems click.
- Boss learning: Untarnished or Vatra. Learn the string, then consider Infinite Seal.
- Trophy runs: stay off Slayer Seal. Peter's Perfect Parry specifically wants Untarnished Seal on Nameless Captive.
- Need an easier game: Slayer Seal. Need a harder game: Night Mode, not a Seal swap — see the Night Mode guide.
Riposte reminder
Every Seal is a tool for filling Break. When the enemy staggers, press attack for a Riposte. Do not dump every Glimpse into pre-boss summons if you still need Shell Bond upgrades — summons and Bonds share that scarce resource.
Community video: things to know before playing, including Seals
Unofficial player video. Seal effects on this page are synthesized from GameSpot, IGN, and Game8 launch guides rather than copied from the video.
Related guides
How to parry · How to Harden · Slayer Seal & Night Mode · Combat guide
Evidence: Seal roster and difficulty caveats follow GameSpot's beginner combat section, IGN's Seal/difficulty pages, and Game8's Best Seal ranking. Achievement restriction language is labeled as community-reported because official store copy does not spell out every Seal penalty. Verified August 23, 2026.