I've always imagine thoughtspores as literally appearing as a huge fleshy pimple on the top of the mages head and it slowly grows until it pops off (and takes a spell with it) and flies off on its own. I imagine a spawnpoint would be equally as disgusting
Oh, hello nightmare fuel! I see you come in unleaded now.
Cognitive Protothallium. Mind 4 Creature. Spawnpoint, Rooted, Uproot 1, Flying. Channeling 1.
When you summon Cognitive Protothallium, it may prepare any number of Mind Creatures, and it may summon one each deployment phase. The prepared spells cannot be changed.
I'm imagining clusters of undifferentiated tissue, arranged into fronds, swaying gently, with Thoughtspores as the gently levitating fruited bodies of each stalk seeking to float away, arranged like the kernels of a grain protruding from a stem. Beneath the gills on its back, the Thalius itself clings to the ground, straining to hold down its wayward and drifting spores until they ripen.