After activation, Special Summon this card, it is treated as an Effect Monster Card (Rock-Type/LIGHT/Level 4/ATK 1000/DEF 1800). When another Trap Card you control treated as a monster is destroyed by your opponent's card (either by battle or by card effect) and would be sent to your Graveyard, you can Set it in your Spell & Trap Card Zone instead. (This card is still treated as a Trap Card.)