Leeching Poison is a level 35 Assassination rogue talent.
- Leeching Poison is a common Rogue spell in the Knights of the Frozen Throne expansion for Hearthstone. Its flavor text reads "No actual leeches were harmed in the creation of this card."
- Patch 8.0.1 (2018-07-17): Leeching Poison is now a passive effect and is no longer applied as its own non-lethal poison.
- Patch 7.0.3 (2016-07-19): Now exclusive to Assassination, and moved to the level 60 talent row (was level 45).
- Patch 6.1.0 (2015-02-24): Redesigned. It now grants 10% Leech while active, and no longer applies a poison effect to the target. Its Shiv effect remains unchanged.
- Patch 5.0.4 (2012-08-28): Added.