[Grandpa]

Uses 5% of Max HP upon Cast. 4 Range Aoe for 4 tiles. Option 1: Lowers Phys defense of all afflicted targets by the amount of HP consumed %
Option 2: Lowers Phys and Mag defense of all afflicted targets by half the amount of HP consumed %

I have 1000 HP. I use this skill. They suddenly have 50% of their phys (or phys and mag) def taken away.

Needless to say, that could get way too strong, way too fast.