Yeah, just wait until you get to BB vs. Astos battle, and Unne will be having some of the best laughs he'll ever have: either Astos begins the battle by killing BB with Rub, or BB will first do a 1 HP attack and then get killed by Astos' Rub.

Oh, and that's why I'd suggest you to play solo games with the original FF1 NES. In the NES version, Astos' Rub hits every now and then, but it can be avoided with a reset or two. But in WSC and PSX versions, I've had to reset 10-20 times before it missed.