Mortilux Heruvur

2+ Level 8 monstersIf a monster(s) is sent to your opponent's GY (except during the Damage Step): You can target 1 of them; attach it to this card. You can only use this effect of "Mortilux Heruvur" once per turn. This card gains effects based on the number of materials attached to it.• 2+: Cannot be destroyed by battle or card effects.• 3+: Your opponent cannot target cards in the GYs with card effects.• 4+: You can detach 3 materials from this card; send 1 monster on the field to the GY.