How much of a CR modification would it be to give a creature the beholders-"anti magic cone" ability?
I just want to make some low to mid level combat based creatures that the party has to do more than just "spell up" to beat.
Hey, I'm new here, so this if a dumb question have lots of fun flaming this one. Is there a place where I can find rules for making "balanced" creatuers? Either skip's deal in the old magazine or somewhere else?