The ripple behind it widened.
No splash. No dramatic burst of sludge or flying limbs. Just an ominous widening of the tar-like basin, as though the surface itself was peeling back to let something through. I shuddered to think that this substance may have been giving birth to new entities, as that's essentially what it gave the impression of.
From the thick center of the pool, another figure began to rise, but this one didn't shift between forms like the first. It held a consistent shape—humanoid, tall, and far too composed for a thing made of fluid. Its head tilted slightly as it stood–speaking of how it stood, it was unlike any of the beasts that simply charged at us with blind rage. This one had an intelligent poise, ideally not as intelligent as our primary foe, but still, I'd bet money on it being able to strategize.
