Archrot

For the duration, your Necrobotany powers ignore necrotic resistance and immunity in plants, fungi, wooden constructs, and creatures restrained by your dead growth. When you create or animate dead plant matter, it gains resistance to bludgeoning, piercing, poison, and necrotic damage.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.