SK damage types are in real life (I would go further but I don't want to sound gruesome or offensive)
NORMAL Punches, kicks, getting clubbed (may cause stun), scratched, anything else that relates,
PIERCING Bee stings, stabs, needles, spike-leafed-plants, animal fangs, cactus, bullets,
ELEMENTAL Electrocution (also causes shock), Fire (also causes fire), tasers (also causes shock), cold places with no warm wear (also causes freeze), explosives (may cause fire), stars in outer space, flashbang grenades (split normal/elemental. Also causes stun),
SHADOW My cat's litterbox every few hours over a room-wide radius (also causes poison), carbon monoxide (imminent poison), drowning (split shadow/normal), any song from Justin Bieber (also causes curse), toxic gas, emissions from a vehicle's exhaust pipe,
SIDE NOTE: When cutting the oleander bushes at the side of my house with my survival knife (with the help of my dad), I DID sort of get some poisonous liquid on it. So yes, in real life, I have a makeshift Dread Venom Striker. Go nuts :P
Once this gets a bit more popularity, I'll add a few more facts.
You sir, are a genius.