Shells

Tiel

The Acolyte · Playable Shell

Tiel is a mobile Poison assassin who earns Shadow through precise dodges, then converts Poison stacks and Shadow Strike into critical burst.

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On this pageOverview

Field profile

Overview

Tiel base attributes
Health	85
Resolve	100
Bleed resistance	6
Frost resistance	5
Shock resistance	7
Curse resistance	8

Best for

Fast, reactive players
Poison and critical builds
Players comfortable fighting near enemy attack windows

Strengths

Excellent mobility and dodge-based Shadow generation
Poison stacking converts into strong burst
Critical follow-ups reward clean sequencing

Tradeoffs

Low health punishes missed dodge timing
Shadow Strike loses value if Poison and Resolve are not prepared
Overcommitting after a successful dash can erase the defensive advantage

Recruitment site

Mushroom Village

Recruit Tiel at the Shell recruitment site in Mushroom Village.

Open exact map marker ↗

Core kit

Core abilities

Passive trait

Shadow Dash

Passive

Dashing just before getting struck grants Tiel Shadow and inflicts Stagger Damage .

Active Shell ability

Lingering Shadow

Active

Tiel gains Shadow and prepares to perform a Shadow Strike with his dagger.

Resolve cost: 40
Cooldown: 8s

How to play

Tiel combat guide

Stay close enough to trigger Shadow Dash but far enough to avoid trading through Tiel's modest health. Build Poison before Shadow Strike, then use the guaranteed or improved critical follow-up while the target is still vulnerable.

Field sequence

Combat loop

4 steps

01Build Poison with fast melee hits or a ranged opener.
02Dodge just before impact to trigger Shadow Dash.
03Hold Shadow only as long as needed to improve the strike, then land Shadow Strike.
04Spend the critical follow-up on the best available melee or ranged hit before the window is lost.

Upgrade order

Ability priorities

5 picks

01Lasting Legacy
02Escalation
03Plague Bearer
04Poison Burst
05Critical Role

Bond path

Progression plan

early

Lasting Legacy extends Shadow, Escalation improves Shadow Strike, and Plague Bearer makes the Poison plan safer.

mid

Poison Burst and Critical Role convert setup into damage; Lethality supports repeated Shadow Strike use.

late

Shadow Clone, Ambush, and Deathmark add control and critical scaling once the core dodge-and-burst loop is consistent.

Build craft

Weapon and Tarstone synergies

Weapons & sidearms

Tarstones

Field notes

Shadow Dash rewards a late dodge, not repeated panic rolls.
Apply Poison before Shadow Strike so Poison Burst and critical follow-ups have a real target.
Tiel cannot absorb the same mistakes as Lazlo or Eredrim; exit after the burst instead of forcing another exchange.

Interactive progression

Skill tree

Open a Bond Tier branch to inspect its skills, Shell Point costs, and every upgrade level. Tier lines show unlock order; skills inside the same tier remain independent purchases.

Shell coreTiel4 Bond Tiers · 12 skill branches

Bond Tier 13 skills · unlock this tier before purchasing its nodes
1. 01Escalation3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 1Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1Shadow Strike deals 125% damage
  2. Level 2Shadow Strike deals 140% damage
  3. Level 3Shadow Strike inflicts 10 Poison stacks
2. 02Lasting Legacy4 levels · 1 / 2 / 3 / 4 Shell Points
  Bond Tier 1Level costs: 1 / 2 / 3 / 4
  Open full skill entry ↗
  1. Level 1Tiel gains 2 additional Shadow stacks from his abilities
  2. Level 2Tiel gains 3 additional Shadow stacks from his abilities
  3. Level 3Tiel gains 4 additional Shadow stacks from his abilities
  4. Level 4Tiel gains 5 additional Shadow stacks from his abilities
3. 03Plague Bearer3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 1Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1Tiel has +50% Poison mitigation
  2. Level 2Tiel has Poison immunity
  3. Level 3Poison restores a portion of Health
Bond Tier 23 skills · unlock this tier before purchasing its nodes
1. 01Deathmark3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 2Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1Shadow Strike has +23% Critical Hit chance
  2. Level 2Shadow Strike deals 120% Critical damage
  3. Level 3Shadow Strike inflicts 10 Fragile stacks
2. 02Nightstride4 levels · 1 / 2 / 3 / 4 Shell Points
  Bond Tier 2Level costs: 1 / 2 / 3 / 4
  Open full skill entry ↗
  1. Level 1Shadow Dash activation window increased by 20%
  2. Level 2Shadow Dash deals 300% Stagger Damage
  3. Level 3Shadow Dash deals 50 damage
  4. Level 4Shadow Dash activation window increased by 45%
3. 03Poison Burst3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 2Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1Each detonated Poison stack deals 4 damage
  2. Level 2Each detonated Poison stack deals 6 damage
  3. Level 3The struck enemy also emits a Poisonous cloud
Bond Tier 33 skills · unlock this tier before purchasing its nodes
1. 01Ambush3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 3Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1Tiel deals 150% damage
  2. Level 2Tiel has +25% Critical Hit chance
  3. Level 3Tiel deals 120% Critical Hit damage
2. 02Lethality3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 3Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1Tiel restores 10 Resolve
  2. Level 2Tiel restores 20 Resolve
  3. Level 3Tiel has 50% chance to reactivate Lingering Shadow immediately
3. 03Shadow Stalk3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 3Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1Shadow Strike deals 2 more damage for every 0.5s spent while Shadowed
  2. Level 2Shadow Strike deals 3 more damage for every 0.5s spent while Shadowed
  3. Level 3Shadow Strike deals 4 more damage for every 0.5s spent while Shadowed
Bond Tier 43 skills · unlock this tier before purchasing its nodes
1. 01Critical Role3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 4Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1After a Shadow Strike, the next melee attack strikes Critically
  2. Level 2After a Shadow Strike, the next ranged attack also strikes Critically
  3. Level 3Those Critical Hits deal +100% damage
2. 02Seal Affinity3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 4Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1A failed Guard, Parry or Harden grant Tiel 3 Shadow stacks
  2. Level 2A Perfect Guard, successful Parry or Perfect Harden deal 120% Break Damage
  3. Level 3Each consecutive Perfect Guard, Parry or Perfect Harden without being struck accumulates 5 additional Break Damage.
3. 03Shadow Clone3 levels · 1 / 2 / 3 Shell Points
  Bond Tier 4Level costs: 1 / 2 / 3
  Open full skill entry ↗
  1. Level 1Shadow Dash leaves behind a Shadow Clone that inflicts 2 Poison stacks to enemies that strike it. The clone can resist up to 3 strikes.
  2. Level 2Shadow Dash leaves behind a Shadow Clone that inflicts 2 Poison stacks to enemies that strike it. The clone can resist up to 5 strikes.
  3. Level 3When the Shadow Clone expires, it burst into a Poisonous cloud that lasts for 5s

Video guide

Build video

Mortal Shell 2 Tiel Build Guide - How to Play Tiel

Poison build, abilities, skill priorities, weapons, Tarstones, and final tips

Channel: Fextralife ↗
Published: 2026-08-18
Length: 12m 44s

Watch on YouTube ↗

Memories

Tiel memory costs and rewards
An Old Friend	Cost 500 · Reward 500
Ember of Rebirth	Cost 500 · Reward 500
The Bottle	Cost 500 · Reward 500
The Bottle 2	Cost 500 · Reward 750
The Cure	Cost 500 · Reward 750
The Cure 4	Cost 500 · Reward 1000
The Rash	Cost 500 · Reward 500