Assemblier cube-macrobia assemblia? In shape it’s like the gelatinous cube, but it breaks down technological items and leaves other technologies behind, sometimes stronger,sometimes weaker but always stranger!
Spellweaver-multilimbar arcania castius? It’s a 6-limbed humanoid that can cast multiple spells at the same time! It uses 1 arm per spell level. I’m not sure if we did the spellweaver already.