Mutilator Plate is a Unique Chest Armor in Diablo IV Season 15. It drops from Duriel, King of Maggots.
Unique power
You are Blood Lanced, and when Blood Lance would deal damage to you, it instead Fortifies you for 5% of your Maximum Life and has a 10% chance to form a Blood Orb. Blood Lance deals [70 - 90]% increased damage.
Affixes
+1-3 to Blood Lance
Where it drops
Random world drop / any Lair Boss (one guide: 'drops at any Difficulty Tier, increased drop rate per Torment tier'); 3.2.1: all Uniques drop from level 1 in any Difficulty; targetable via Horadric Cube reroll