Tibalt, the Fiend-Blooded

Oracle Text

+1: Draw a card, then discard a card at random.

−4: Tibalt, the Fiend-Blooded deals damage equal to the number of cards in target player's hand to that player.

−6: Gain control of all creatures until end of turn. Untap them. They gain haste until end of turn.

Card Rulings

5/1/2012 The number of cards in the target player’s hand is determined when Tibalt’s second ability resolves.
5/1/2012 When Tibalt’s third ability resolves, all creatures will become untapped and gain haste, including ones you controlled before the ability resolved.