You can only Special Summon “Star Mine(s)” once per turn.
(1) If this card in its owner’s possession is destroyed by an opponent’s card effect, or destroyed by battle with an opponent’s attacking monster: Take 2000 damage, then inflict 2000 damage to your opponent.
(2) If a monster(s) in this card’s adjacent Monster Zone(s) is destroyed by battle with an opponent’s attacking monster, or by an opponent’s card effect: Destroy this card, and if you do, take 2000 damage, then inflict 2000 damage to your opponent.