Neji Hyuga, Clan Prodigy

Vigilance

{2}{g}{t}: Search your library for the Byakugan
artifact and equip it to Neji. Shuffle afterwards.

Whenever Neji blocks or becomes blocked by a
creature an opponent controls, you and that
creature's controller reveal the top cards of your libraries. Then, if the card you reveal has a higher
mana cost than your opponent's card, tap that
creature and a put a stun counter on it.