Batman, The Caped Crusader

Vigilance, Menace, Double Strike
Bat Signal - {1}{u}{b}, Reveal Batman, The Caped Crusader from your hand: Search your library for
a noncreature artifact with a converted mana cost
of X, where X is the amount of times you've
used this ability and exile it with a gadget counter
on it. When Batman, The Caped Crusader enters
the battlefield, put all artifacts exiled with gadget
counters on them into play.