Manor Vault

Manor Vault does not untap during your
untap phase.
At the end of your upkeep, if Manor Vault is tapped, it deals 1 damage to you.
{4}: Untap Manor Vault at end of upkeep. Use
this ability only during your upkeep.
{t}: Add three colorless mana to your mana
pool. Play this ability as a mana source.