Aethergeode Miner is a rare Creature — Dwarf Scout card from Aether Revolt (AER), collector number 4. Current market price: $0.15 (foil $0.89), TCGplayer market prices via Scryfall.
Whenever this creature attacks, you get {E}{E} (two energy counters). Pay {E}{E}: Exile this creature, then return it to the battlefield under its owner's control.