Ugek, Ulvenwald Beastmaster

Ugek, Ulvenwald Beastmaster enters the battlefield with X +1/+1 counters on it.
When Ugek, Ulvenwald Beastmaster enters the battlefield, reveal cards from the top of your library until you reveal a beast creature with converted mana cot X and put it onto the battlefield. Then, shuffle your library.
Beasts you control get +1/+1 for each +1/+1 counter on Ugek.