X'Fal's Corroded Signet - Unique - Diablo IV Season 15
X'Fal's Corroded Signet is a Unique Ring 1 in Diablo IV Season 15 for Barbarian, Druid, Necromancer, Rogue, Sorcerer, Spiritborn, Warlock. It drops from Lord Zir.
Unique power
Each Damage over Time type you apply explodes every second, dealing [450 - 525] damage over 4 seconds to surrounding enemies.
Affixes
Primary Core Stat
Damage Over Time Multiplier
Where it drops
Lord Zir (Initiate Lair Boss, 1x Lair Key) - dedicated multi-class Unique
General Unique Pool - every Lair Boss (Initiate, Greater, Exalted, Belial) can drop it in addition to their dedicated table (one guide's Boss Loot Table Cheat Sheet)