Mog is one of my favorite characters ever, and his dance abilities are really powerful.
Not really advocating for a "dance" but the thing about it that made it special (in my opinion) was how it changed the "environment". Could illusion spells be visually stunning?
When the Wizard casts the illusion the calm wooden area transforms into a fiery scenery or burning hell, panicing the enemies. Or Horror makes it look like ghosts are floating spectrally in and out around them.
How mean can the illusions be, and could they also be so great that they could extend someone's life, enhancing the willpower of others. Or to escape.
It'd be fun with an illusion where you create pitfalls, and if an enemy walks into it they stumble and get stunned laying on the ground for 1 turn~. An illusion that makes them encumbered, making them believe they are wearing more than they can, as if the metal armors suddenly began to wear a couple of tons each.
TL;DR: Environmental and Visual/Graphical Illusion Spells.
Thoughts?