L glanced up sharply. He'd been idly teasing a spider with his finger... maybe real, maybe imaginary... when his ears picked up something about a spell that could kill Blythe. "Feeding off my core lifeforce" didn't sound good, either. And even if the spell succeeded, weapons could still inflict damage...? It seemed utterly pointless.
He shuffled slightly closer, still hanging back a bit. "Isn't there an easier spell you could start with, before trying something like that?" he ventured hesitantly. An expert on overexertion himself, L didn't even trust "slim to none" odds.