Lightweight would have the drugs destroyed. Crystal Meth, cocaine, heroin, black out rapist drugs, caffeine. The world doesn't need any more desginer narcotics.
The (quite old) Adventurer's Club magazine 22 or 23 has a adventure called The fright before christmas by Scott Heine. Santa Claus is corrupted by Coatlicue's Skull Pendant from the adventure To serve and protect and becomes a sort of Dark Santa.
Maybe Krampus is Santa's evil alter ego.
Bryce Bonny was working in his petting zoo, tending to the rabbit pen when a truck transporting toxic waste crashed into a nearby tree and irradiated the pen. The bunnies in their panic bit Bonny infecting him. So whenever he becomes angry or stressed, he transforms into The Incomparable Lepus!
"LEPUS HOPS!!! LEPUS SMASH!!!!!!!"