Pinkie Pie, Laughter's Avatar

Haste
When Pinkie Pie, Laughter's Avatar enters the battlefield, you may search your library for any number of Pony creatures and reveal those cards. Shuffle your library, then put them on top of the battlefield on any order
{3}{r}{r}: Pony creatures you control get +x/+x until the end of the turn, where x is the number of Pony creatures you control