Prahv

Plane — Ravnica   

If you cast a spell this turn, you can't attack with creatures. If you attacked with creatures this turn, you can't cast spells. Whenever you roll , you gain life equal to the number of cards in your hand.

31 PC2 • ENDrew Baker

™ & © 1993—2012 Wizards of the Coast

Legal in: Legacy,Vintage,Commander

Oracle Text (click to copy):

6/1/2012
Prahv only cares about the turn-based action of declaring attackers. If an effect allows you to put a creature onto the battlefield attacking, you can cast spells later that turn.