Bircalin

They're cursed to grow netherwarts in the nether regions. Heh.

Those who picked up nether taint there eventually have nightmares, start physically weakening and withering, and then die. Up to you if you're a Nether Champion and want to RP that or not.

I already have the nightmares, plenty of them. As for the weakness, my character had spent 70-80 years bed-ridden whilst he taught someone Druidic techniques and minor magic to sustain his wounds, but I can manage with the weakness ^^