Forum:Earthbound Immortal Cusillu

in OCG packs, Ancient Prophecy is out, and I've gotten an Earthbound Immortal Cusillu. The problem is, Cusillu's effect is a weird contradiction. Here's what it is. => cannot be chosen as an attack target (this i understand) => if this card is to be destroyed by battle, you can tribute 1 monster on your side on the field and half your opponent's life points instead. here's the problem, if an Earthbound Immortal can't even be attacked, how the hell can Cusillu's effect resolve??? Please help.