The one lashed against the wall screeches and pulls at the restraints, one arm detaching completely. The tendrils redouble its restraints, wrapping bodily around it instead. Said arm falls to the ground and disintegrates into liquid ooze.

The free one is impaled by Rex's arm and starts to make good on it's position to bash him against the wall, but Ran's well-placed bullet bashes against it's upper torso, causing it to reel backwards.

When Rex's cure takes place, it screams and convulses, jerking to the ground, the four-limbed mass lurches, the gelid body melting away and leaving...

Nothing. A mess of blood and strange, spongy tissue. That's it.