Night Howlers provides optional rules for demihuman lycanthropes:
These few words open a fascinating realm of possibilities. They invite one to weave demihumans' long histories (Meditor weresharks? Shadowelves as werebats in their caverns! in Alfheim? Dwarven wereseals on Ostland's coasts...?)Dungeon Masters may allow certain humanoids to be affected by lycanthropy, either becoming lycanthropes when infected (as the merrow do with shark lycanthropy) or reacting to the disease as tough it were poison (as with demihumans). Humanoids very similar to humans—orcs and the like—are most likely to be affected by lycanthropy, while trolls and other strange creatures are most likely immune.
The Dungeon Master may allow demihuman werecreatures. In lycanthropic levels, they would advance at the same rate as human werecreatures, topping out at thirty-sixth level. They also would advance as demihumans according to the standard rules.
Are demihumans more (or exclusively) susceptible to certain strains? ("Halflings can only become werefoxes; no gnomish weresharks!")
Is balance ruined? (Imagine demihumans following the optional path of thirty-six levels as lycanthropes to boot. Might they be too powerful, or be taking too long to advance?)
And what about humanoids? Would trolls be excluded? What of ogres? The n'djatwa? I imagine goblins and hobgoblins who are werewolves riding or leading pack of dire wolves; or werebear bugbears in similar scenarios with bears....
We know from The Sea People that not only merrow, but at least tritons, may become weresharks. Can these also become wereseals?What about kna, kopru, aquatic elves, sea giants, etc.? And can marine creatures only become weresharks or wereseals, and terrestrial creatures terrestrial lycanthropes? A dwarven wereseal or a triton weretiger would face horrible and zany conundrums!
I'd really like to know if anyone has used these optional rules and how it went. or even just hear thoughts from others in the abstract. Thanks!