Most UseLESS Spell

[Masamune·1600]

The Enemy Skill you are referring to is Magic Hammer, and it is from FFVII. It reduces a single enemy's MP by 100, but it does not drain it.

Actually, Magic Hammer in FFVII does drain 100 MP. In fact, of the four times Magic Hammer has appeared as Blue Magic in the series, FFVII contained the only version where it drained MP. MagHammer (Magic Hammer) in FFV halves an enemy's MP. It is not drained. Similarly, Magic Hammer in FFIX and FFTA damage MP, but do not drain it.