You searched for bone armor
1. bone armor
Syntax: cast 'bone armor'
Bone armor is a self‑cast Necromancer spell which mitigates up to the first
four hits, once the spell has been fully mastered, by ‑20%, ‑15%, ‑10%, and
‑5% damage before the armor shatters and is useless. It can be recast again
after battle.