Link, Boy of the Forest

{t}{x}: Search your library for a Equipment card with converted mana cost X and put it in your hand.
{x}{u}{r}{g} : Exile Link, Boy of the Forest with 7 time counters, then remove X of them. During each upkeep, remove a time counter, then if there are no counters, return him to the battlefield transformed under his owner's control. Activate this ability only any time you could cast a sorcery.