Axton, The Commando

Gone Vault hunting
When Axton, The Commando 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 Turret with
haste until the end of the turn, for each damage
this Turret deals, put one ammo counter
on equipped weapon