Board Thread:Off Topic/@comment-25343309-20150430230909/@comment-3965075-20150507065712

For #1 and 2, I'd say mutations. If it's a genetic factor without anything super or extra-ordinary (like being an albino), then I say it might fit into #3. Any outlandish ones (like say a werewolf/beast/reaper/Cthulhu form) would be #4.