I propose new #Hearthstone slang:
Leethal - n. Game-ending face damage pertaining to Leeroy Jenkins in-hand.
Example: “if I went face I would have Leethal next turn but then I’d just die to Leethal and this is a mirror match, so I better trade”
(Context: i won a game with Leethal after playing around a possible Leeroy from my opponent - which was necessary, not for Leeroy Jenkins, but their last-card Doomguard instead)