Vault Raidmaster

Whenever Vault Raidmaster deals combat
damage to a player, create a colorless Treasure
artifact token with "{t}, Sacrifice this artifact:
Add one mana of any color."
{2}{u}{u}: This creature cannot be blocked this
turn except by two or more Walls.
{t}, Sacrifice four Treasures and this creature:
Take an extra turn after this one. Activate this
ability only any time you could cast a sorcery.