You can Ritual Summon this card with Litmus Doom Ritual . Unaffected by Trap effects. Cannot be destroyed by battle. While there is a face-up Trap Card on the field, this card gains 3000 ATK DEF. If this Ritual Summoned card is destroyed by your opponent s card (by battle or card effect): You can target 1 Trap in the GY; Set it to your Spell & Trap Zone.