Covered in veins of arcane blue magic, Cain's limp arm started to move again.
[Animate dead] is a spell that allows corpses to move by creating a magical nervous system for carrying signals to the bones and forcing the body to move through magic. That spell didn't need muscles as magic could attach to anything, as long as a skeleton exist, the body will move.
The spider's poison attacked the nerves in his arm, severely damaging them. The fangs also tore his forearm's muscles, simply healing it will take a long time.
Since he doesn't have an hour or two for his arm to heal, Cain decided to force it to move by animating it with [Animate dead]
"As long as I'm still conscious and have enough MP, my body won't fail to move!" Cain declared as he stood up, sword in hand.
Alice was confused at what he meant, she could feel cursed magic coming from him but she wasn't able to know that it was necromancy.
