Aether Vial is a mythic Artifact card from From the Vault: Relics (V10), collector number 1. Current market price: — (foil $5.91), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, you may put a charge counter on this artifact. {T}: You may put a creature card with mana value equal to the number of charge counters on this artifact from your hand onto the battlefield.