Long Tail Dynarats

Draught of Leeching Strikes are contained in the chest of Chaotic Concoctions that appears in Torghast, Tower of the Damned while the "Chaotic Concoctions" Blessing is active. The draught has a 10-second cooldown, shared with Draught of Leeching Strikes and Draught of Temporal Rush, which are also contained in the chest, but not with other potions.