I was playing Final Fantasy Dimensions this morning before I had to leave for school and decided to head to the cave inside of Deist since taking 400+ per hit didn't scare me anymore. XD I ran into the Avenger, which is an enemy weak to every element in the game, but it also absorbs all elements. I could get anything to do damage and eventually quit because I had to leave for school.

I ended up using Tornado and Magic Missile to kill them, even though now I figured out why physical attacks wouldn't work: everyone has an elemental weapon XD