Rarest enemies to spawn in a game? (Maybe spoilers?)

Tyranthraxus posted...

Old gray brick had an easy rng exploit to encounter him but I could never get him to drop the seven sword.

It wasn't really worth it anyway.

I mostly played on a GBC where the RNG exploits didn't seem to work.

Never got the Seven Sword either. Not that I spent too much time trying; I killed a few of them then got sick of it.