Illusion Mostly an exercise in building images. He has managed a rough house of wood.

TP Cost - Variable : Constant Drain depending on complexity.

"Enchantments" - etching or otherwise marking a formula into a surface.

Heat Preservation formula for keeping things warm. Like tea at a comfortable drinking temperature, provided it isn't sitting in the freezer.
Cost is a charge - the more he pours into it, the longer the effects last.