Gonti's Aether Heart

Gonti's Aether Heart
Aether Revolt - Mythic Rare
Legendary Artifact
Vincent Proce
Whenever Gonti's Aether Heart or another artifact enters the battlefield under your control, you get (two energy counters).
Pay , Exile Gonti's Aether Heart: Take an extra turn after this one.

Rulings

Buy as cheap as: $0.83 (Average: $0.83 High: $5.96)
Edit