Storm the Vault // Vault of Catlacan [Rivals of Ixalan]

Description

Set:	Rivals of Ixalan
Type:	Legendary Enchantment
Rarity:	Rare
Cost:	{2}{U}{R}

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.