Wound Drinker is a Unique Ring in Diablo IV Season 15 for Spiritborn. It comes from Horadric Cube: Upgrade Common Ring to Unique; Echo of Varshan (Malignant Burrow, Hawezar) - one guide S15 / another guide.
Unique power
Every time you deal Thorns damage, you gain [7 - 10] Vigor. Gain Toxic Skin's Passive Effect.
Affixes
+Dexterity
+Thorns
Where it drops
Horadric Cube: Upgrade Common Ring to Unique
Echo of Varshan (Malignant Burrow, Hawezar) - one guide S15 / another guide