Wound Drinker is a Unique Ring in Diablo IV Season 15 for Spiritborn. It comes from Echo of Varshan (Malignant Burrow, Hawezar); Horadric Cube: Upgrade Common Ring to Unique.
Unique power
Every time you deal Thorns damage, you gain [7 - 10] Vigor. Gain Toxic Skin's Passive Effect.