The doctor will see you now, he's in a bit of a rush but there's just enough time to squeeze you in. Word of warning: he doesn't like it when people stare, it makes him feel self conscious. Cards used: Grotesque Dragonhawk, Young Dragonhawk x2, Timber Wolf x2, Tundra Rhino. Skip to 0:40 for the OTK turn. Skip to 1:17 for bloopers. Hearthstone is an online collectible card game created by Blizzard, with PvP and PvE content themed around World of Warcraft. OTK refers to one turn kill, a special form of gameplay where you can kill the opponent in a single turn, without relying on minions or weapons on board from a previous turn. OTKs are rarely viable in competitive gameplay, but as the flashy trickshots of the Hearthstone world, they are very entertaining..