From the Vault: Relics: Aether Vial

Edition:	From the Vault: Relics
Type:	Artifact
Cast:
Rarity:	M
Collector #:	001
At the beginning of your upkeep, you may put a charge counter on Aether Vial. : You may put a creature card with converted mana cost equal to the number of charge counters on Aether Vial from your hand onto the battlefield.
Pro Tip! Aether Vial is an amazing way for creature decks to "cheat" on mana, effectively deploying more creatures for less mana while also dodging counterspells.