Mana Vault (Rainbow Foil) [Secret Lair Drop Series] HER133 It can't be blocked this

It can't be blocked this turn

Reverse Type: Token (This token can be used to represent a token that's a copy of a permanent

except it doesn't copy that creature's color and it has "At the beginning of your upkeep

Whenever Prowl attacks

Birthright Boon 1W

Mana Vault (Rainbow Foil) [Secret Lair Drop Series] HER133 It can't be blocked thisSet: Secret Lair Drop Series Type: Artifact Rarity: Mythic Cost: {1} Mana Vault doesn't untap during your untap step. At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault. At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you. {T}: Add {C}{C}{C}.