Rich Mana Vault

When Rich Mana Vault enters the battlefield, sacrifice it unless you pay {1}
Rich Mana Vault enters the battlefield tapped and doesn't untap during
your next untapped step.
{5} Untap Rich Mana Vault.
{t} Add {x}
{t} Add {9}
Whenever you use either of Rich Mana Vault's {t}s, RichMana Vault deals 3 damage
to each player.