Well this was problematic; Simo had no idea that casting spells could be this exhausting. And it wasn't even physically exhausting, but something else. It was like a muscle that he never had before was starting to get worn out. As someone who hunted beasts five times his size on a slow day back home, he was no stranger to fatigue...but this...this was something very new. What was so strange about it was that it in no way made moving his body any harder. It was truly baffling

While he couldn't bring it down with his Gravity spell, he saw that he didn't need to, as Elim had managed to get his shape-shifting weapon inside of it, with what seemed to be the help of some strange women in blue who looked like she was trying to talk to it. That gave Simo the opening he needed. Lodging a sharp object into it had caused cracks to form on the surface of the core. So all Simo had to do was aim at a particularly nasty looking crack and fire...which is exactly what he did