Mana Vault (Topper) [Ultimate Masters Box Topper]Set: Ultimate Masters Box Topper 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}.

For example

Set: Sword & Shield: Evolving Skies Type: Grass Rarity: Secret Rare Retreat cost: Colorless

the attacking hero puts a card from their hand on top of their deck

The imps' warbling cries echo through Phyrexia's towers like those of mourning doves in a cathedral

if Edgar Markov is in the command zone or on the battlefield

perfectly sized for taking your favorite cards on the go

little cuties like Wooloo and Yamper

Set: World Championships 2018 Type: Fighting Rarity: Rare Retreat cost: Colorless

dreadnoughts for jewelry

"Control the Great Conduit

Set: EX: Legend Maker Type: Stadium Rarity: Uncommon

Set: Sun & Moon: Unbroken Bonds Type: Psychic Rarity: Ultra Rare Retreat cost: Colorless