It is a hidden legendary item. It seems to be present in the game files, but unobtainable in either campaign or multiplayer/custom battles.
This enchanted talisman is carved from the heart of the largest black tree in the Petrified Forest.
Total War: Warhammer II
- Winds of Magic power reserve +5
- Ward save +20%
- Enemy hero action success chance -10%
- Casualty replenishment rate +5% (lord's army)
- Wound recovery time -3
- Passive ability: Regeneration