Witchcraft · Skill
Forbidden Sigils
Increases Witchcraft Ability Slots number. See each level’s cost, its requirements and which levels the manual unlocks, then plan it in your build.
- Tree
- Witchcraft
- Working phase
- Day
- Max level
- Lv.3
- Unlock
- Manual progression

What Does Forbidden Sigils Do?
Increases Witchcraft Ability Slots number.
Forbidden Sigils Levels
| Level | Skill Points | Training Cost | Player Level | Tree SP | Manual | Plan |
|---|---|---|---|---|---|---|
| Lv.12 Slots available. | 1 | 1 | — | — | Required for this level | Plan Lv.1 → |
| Lv.23 Slots available. | 1 | 1 | Lv.5 | 2 | Required for this level | Plan Lv.2 → |
| Lv.34 Slots available. | 2 | 1 | Lv.10 | 4 | Required for this level | Plan Lv.3 → |
Costs are the per-level learning costs. Training Cost is the game’s skill-learning cost unit and is not converted into campaign days. Player Level and tree investment are checked against the values you enter in the planner.
Want to know whether your current build can reach Forbidden Sigils? Add your Player Level, unspent Skill Points and Mutation, and the planner shows exactly what is still missing.
Check in Skill Tree Planner →How to Unlock Forbidden Sigils
PREREQUISITE
Learn Unnatural Resilience first. The planner can add the whole path for you.
PLAYER LEVEL
Lv.2 needs Player Level 5 · Lv.3 needs Player Level 10. Enter your Player Level in the planner to check it against your character.
TREE INVESTMENT
Lv.2 needs 2 Skill Points already spent in Witchcraft · Lv.3 needs 4 Skill Points already spent in Witchcraft. The target skill’s own cost does not count toward this requirement.
SKILL MANUAL
Forbidden Sigils Manual covers Lv.1–Lv.3. A manual only unlocks those levels: you still pay the Skill Points for each one.
Forbidden Sigils Manual

Forbidden Sigils Manual
Covers Forbidden Sigils Lv.1–Lv.3. A manual only unlocks those levels: you still need the Skill Points, Player Level and tree investment listed above.
6 known sources: 5 merchants and 1 other acquisition source.
Where to get it →Where Is Forbidden Sigils in the Skill Tree?
Is Forbidden Sigils Worth Taking?
- Needs a prerequisite
- You have to learn Unnatural Resilience first.
- Opens a path
- 1 later skill sit behind it, so spending here also unlocks what comes next.
- Manual-gated
- Skill Points alone are not enough: levels above the free ones also need Forbidden Sigils Manual.
These are the gates and follow-ups the game data confirms, not a ranking. Which skill is worth it depends on the build you are already running.
Related Skills
Ordered by the real skill graph: prerequisites first, then what this skill unlocks, then the rest of the tree.
- Unnatural Resilience2 ranks

Prerequisite
- Aether Flow3 ranks · Skill Cooldown

Unlocks next
- Amalgam2 ranks

Same tree
- Bewitching Influence3 ranks

Same tree
- Blasphemous Echo2 ranks

Same tree
- Aether Cascade1 rank

Ultimate choice