While the smoldering alligator was a unique and powerful monster with versatile defenses, it was no match against Midnight and Onyx alone. That was saying that Remey's fist wasn't already hitting it.
The fiery impact if Remey's fist on the darkened scales of the smoldering alligator caused the side she had struck to glow bright red. Almost white with the intense heat. Remey had easily attracted fire mana from the boundary of the fire elemental plane. It was enhancing her strength much more than what she had been able to wield just a few moments ago.
This made an opening for Midnight to rake her claws across the weakness scales. Because she was using her physical might, she easily tore through the sift scales. The magical attacks that could have been used would have been reflected by the softened scales.