Earthbound Immortal Cusillu

There can only be 1 "Earthbound Immortal" monster on the field. If there is no face-up Field Spell on the field, destroy this card. Your opponent's monsters cannot target this card for attacks. This card can attack your opponent directly. If this card would be destroyed by battle, you can Tribute 1 other monster instead, and if you do, halve your opponent's LP.