Widow's Web is a Unique Amulet in Diablo IV Season 15 for Spiritborn. It comes from Horadric Cube: Upgrade Common Amulet to Unique; Duriel, King of Maggots (Gaping Crevasse, Kehjistan) - one guide S15 / another guide / a third guide.
Unique power
Your Critical Strikes cause your Poisoning on an enemy to burst, dealing [167 - 200]% of the total Poisoning instantly to them and 10% of the burst to surrounding enemies before removing the Poisoning effect from the primary target.
Affixes
+Dexterity
Poison Damage Multiplier [x]
Where it drops
Horadric Cube: Upgrade Common Amulet to Unique
Duriel, King of Maggots (Gaping Crevasse, Kehjistan) - one guide S15 / another guide / a third guide