Text (MI+errata): 5/4, Flying. ; At the beginning of each player's upkeep, that player may pay {R}{R} or 2 life. If he or she does, the player gains control of ~this~. [Oracle 1999/07/01]
Comes to your side with summoning sickness when you pay for him. You need to start a turn with him in play in order to attack with him. [Duelist Magazine #16, Page 30]