Gaige, The Mechromancer

Gone Vault hunting
When Gaige, Mechromancer enters the battlefield,
look at the top 5 cards of your library,
you may reveal a land and put it into your hand,
if this land was a vault, put it instead onto the battlefield tapped.
{1},{t}Create a 3/3 Deathtrap with
flying and haste until the end of your turn,
put one ammo counter
on equipped weapon