You can Set this card from your hand to your Spell & Trap Card Zone as a Spell Card. During your opponent's turn, when this Set card in the Spell & Trap Card Zone is destroyed and sent to your Graveyard: Special Summon it. If this card is Special Summoned during your opponent's turn: Destroy up to 2 Set cards you control (min. 1). You can only use this effect of "Artifact Beagalltach" once per turn.