Artifact (CMC 1)
Mana Vault doesn't untap during your untap step.
At the beginning of your upkeep, you may pay . If you do, untap Mana Vault.
At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.
: Add .
- [MPS] Masterpiece Series: Kaladesh Inventions #17 (M)