4 mana cost
Gain control of an enemy minion with 3 or less attack until end of turn.
what are your best plays with this card? mine was in arena, I used it on my opponent's Emperor Cobra (http://hearthstone.gamepedia.com/Emperor_Cobra) and used it to kill his 8/8 Twilight Drake that had +1/+1 and Taunt from Defender of Argus
I think this card is completely insane and will almost always get you a 2 for 1 trade. I'm curious to know what happens if you steal a minion that has a deathrattle effect. Like if you use Shadow Madness on Harvest Golem and suicide it into their minions, does the deathrattle summoned minion become yours permanently since you controlled the Harvest Golem when it died? that would be some sweet sweet value