Rivals of Ixalan Promos

Storm the Vault // Vault of Catlacan

Whenever one or more creatures you control deal combat damage to a player, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
At the beginning of your end step, if you control five or more artifacts, transform Storm the Vault.

Rivals of Ixalan

Whenever one or more creatures you control deal combat damage to a player, create a colorless Treasure artifact token with "{T}, Sacrifice this artifact: Add one mana of any color to your mana pool."
At the beginning of your end step, if you control five or more artifacts, transform Storm the Vault.