Since I love gravity and non-elemental magic, my limit would be like...

Darkest Hour
I get a sort of angry and brooding look on my face, and raise my arm up slowly, lifting the enemy into the air with telekinesis-style abilities...

THEN, I close my eyes and the enemy becomes trapped in an unstable purple/black ball of energy, distorting him and the physical surroundings (looks like Diablos' Gravija from FFVIII). This would be the gravity part, which cuts his HP by, say, 1/4 at it's earlier levels.

THEN, the gravity ball implodes on itself, dealing non-elemental damage like Flare, and leaving him with zero Vitality. Of course in real-life terms, the enemy wouldn't have "zero vitality" but would just be very, very weak in general...if not dead.