Servus Mortem

Servus Mortem is earned by completing the Boneyard with a Necromancer cat. This unlocks the Servus Mortem passive ability, which instantly deals 999 damage to a random enemy at the start of each battle. This effectively removes one non-boss, non-mini-boss enemy before the fight even begins. The upgraded version can target bosses and mini-bosses as well, dealing 50 damage to them instead of 999. The kill is credited to the Necromancer bearing this passive, which matters for on-kill triggers. Synergizes well with Raven Feather (a neck item that applies Soul Link), potentially chaining the instant kill to eliminate multiple enemies on turn zero.