Animal mesoderm forms by enterocoelic pouching, through invagination of the endoderm. The main deuterostome phyla are the Echinodermata and the Chordata. Echinoderms are exclusively marine and include starfish, sea urchins, and sea cucumbers. The chordates are dominated by the vertebrates (animals with backbones), which consist of fishes, amphibians, reptiles, birds, and mammals. The deuterostomes also include the Hemichordata (acorn worms). The Ecdysozoa are protostomes, named after their shared trait of ecdysis, growth by moulting. They include the largest animal phylum, the Arthropoda, which contains insects, spiders, crabs, and their kin. All of these have a body divided into repeating segments, typically
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