The sword cuts through the slime's core as easily as the sword has cut everything else. The Mutant Chameleon Metallic Slime falls apart silently into goo, and dissipates into smoke, leaving behind a shimmering cloak.
Bella feels stronger, in some way that's hard to pin down. The fatigue from casting Flash has faded more quickly than before; she's sure of that now. Her sword steadier in her hand than before, in her improvised stance.
The golden doors at the back of the room swing open.