Endoskeleton three phyla and one subclass of animals, endoskeletons of various complexity are found: Chordata, Echinodermata, Porifera, and Coleoidea. An endoskeleton may function purely for support (as in the case of sponges), but often serves as an attachment site for muscle and a mechanism for transmitting muscular forces. A true endoskeleton is derived from mesodermal tissue. Such a skeleton is present in echinoderms and chordates. The poriferan 'skeleton' consists of microscopic calcareous or siliceous spicules or a spongin network. The Coleoidae do not have a true endoskeleton in the evolutionary sense; there, a mollusk exoskeleton evolved into several sorts of internal
Phyla-Vell encounter Maelstrom and the Dragon of the Moon. After losing the Quantum Bands to Maelstrom Phyla is offered as a sacrifice to the Dragon so that Maelstrom can be in its good graces. While inside the dragon she apparently makes a deal in exchange for Heather Douglas. The dragon then releases them, with Phyla wearing a new red and black costume adorned with skulls and wielding a new sword, and they return to the world of the living where Phyla refuses to elaborate on the deal that she made with the Dragon. It is later learned from Maelstrom that she