At 10th level, a grave warden can slay a studied undead opponent. This ability functions as the assassinate advanced slayer talent, except it requires a successful Will saving throw instead of a successful Fortitude save, affects only undead, and destroys the target instead of killing it. If the target succeeds at its saving throw, it becomes immune to that grave warden's dustbringer ability for 24 hours. This ability replaces the advanced slayer talent gained at 10th level.