Look it's some critters based off critters from burgess shale fossils.
It's a cheery old war weapon that can impale sounds on its spines. If someone says all the words in a spells title (Say "Cure" "light" and "wounds") it can immediately cast that spell. The person will not be able to use those words for a week. Can be dangerously aggressive about maintaining the "aural hygiene" around its lair.
Jummerlng can store "time" as use it as weapon, like "an aging beam" and an "evolution beam" (ignoring how evolution actually works). They are responsible for making all of the above , they think. They kinda went mad due to dabbling into possibility harvesting and lost everything and now are deluded solipsists living in coral towers drifting on the surface of underground lakes.