Here's a posting of some of my ideas from the discord, as thought up during the last turn.
Design : A-Salt And Buttering
The aptly named A-Salt and Buttering spell is an exotic and advanced combat conjuration spell that summons at least one, though skilled and experienced casters can sometimes manage more, great salt crystals the size of a mortal man from the heavens above from which they rain down with great force. These crystals, being sharp, pointy, and most of all heavy while moving with extreme amounts of speed, tend to very much crush whatever they land upon, after which the second part of the spell activates and the outer layer of the crystals erupts with boiling butter, spraying across anyone nearby to deal painful and incapacitating burns upon their flesh. Being effectively a form of boiling oil, this molten butter tends to have little problem leaking through armor and into any crack or weak point a shell or thick hide might have to, as they say, 'share the heat'.
Design : Rainbow Starshower
Inspired by the way the Five-pointed Star Witches collective Five-point spells work, the Rainbow Starshower spell attempts to use similar principles to allow for the unified might of the Star Witches to be manifest in a more advanced variant of the basic Magic Missile spell. By reverse engineering some of the basic mechanisms of the Star Witches mental matrix, it has proven possible to create a variant missile spell that allows for a collection of bolts to be generated within a single casting instead of a single overpowered blast. While each of these individual bolts are actually weaker then a normal magic missile, far more can be generated per caster then said caster could cast of normal magic missiles, and the spell grows more cost effective as multiple casters pool their efforts together, which the Star Witches are already pretty effective at anyway. This results in a great shower of magic bolts raining down upon the targeted area, and if each are individually inferior... well, as the enemy ratmen have proven, numbers have a power in and of themselves.
The rainbow part of the name comes from an unexplained quirk of the spell. For some reason, each individual caster generates bolts of a different, and specific to the caster, hue. This doesn't actually have much of any combat effect, but it certainly makes the spell more flashy and colorful.
Design : Rain of Crabs
Everyone has heard the phase 'raining cats and dogs', but have you ever heard of it raining crabs? Because that is what this spell makes it do. By summoning some very angry crabs from the ocean deep, pumping some raw elemental good into them so they'll focus on beings that radiate evil and consider other good beings friends, and then dropping them on a targeted area from above the caster who knows this spell can make a whole lot of bad people very unhappy with their lives when they find themselves being repeatedly crabbed in the toes, nose, fingers, and any other bits of pincer-vulnerable flesh they might have. After all, the swarm of crabs is going to be kinda angry from being summoned from the ocean and then being dropped ten or twenty feet, and they'll take that anger out on anything they can get their pincers ahold of.
Design : Call of the Ancient Blood
By spilling a pinpricks worth of blood upon the ground, the caster calls upon the spirits of ancient entities long forgotten by mortals... but still remembered by those that sleep beneath the waters. Soon, the soil will stir and tremble as ancient crustaceans never seen alive by human eyes awaken and begin the swarm in their ghostly hordes, erupting from their long forgotten hatching grounds by the deep and enduring ties of kinship all life has with one another. In Muu's name, these swarms will muster themselves to fight for the angel for the duration of the battle, opposing the darkness for as long as the caster can support their return to this earth.
Revision : Salt Bolt
By studying the ways of salt crystals, our spellcasters have learned to form their magic missiles into a crystalline shard shaped like a piece of salt. While still formed of magic, and of raw elemental goodness, and no more raw energy then is used in a normal magic missile, this crystal shape allows the bolt increased stability, therefor granting it improved range, flight speed, accuracy, and most importantly the fact that it is rather sharp and pointy and therefor hurts a lot more when it hits someone in the face. And then it explodes just like a normal magic missile tends to do.