Plargg, Dean of Chaos #155

T, Discard a card: Draw a card. 4R, T: Reveal cards from the top of your library until you reveal a nonlegendary, nonland card with mana value 3 or less. You may cast that card without paying its mana cost. Put all revealed cards not cast this way on the bottom of your library in a random order.

Other tapped creatures you control get +1/+0. Other untapped creatures you control get +0/+1. Whenever you attack, untap each creature you control, then tap any number of creatures you control.