Ervin, Adventurous Youth

Flying
When Ervin, Adventurous Youth is played, search
your library for a card called Krassgathenulok,
Blade of Entropy, then equip it to him. Shuffle
your library.
Whenever 3 nontoken creatures have been
destroyed by this card, exile Ervin, Adventurous
Youth, then return him to battlefield transformed under his owners control.