evil
playful
Acherontic
Draconian
Lethean
Mephistophelian
Plutonian
Plutonic
Stygian
Tartarean
accursed
animal
anthropophagous
arch
atrocious
bad
barbaric
barbarous
beastly
bestial
bloodthirsty
bloody
bloody-minded
brutal
brutalized
brute
brutish
cannibalistic
chthonian
chthonic
crazy
cruel
cruel-hearted
cursed
damnable
demoniac
demoniacal
demonic
demonish
demonlike
destructive
detestable
deuced
devil-like
diabolic
diabolical
elfish
abominable
hellish
impish
infernal
inhuman
insane
malevolent
malicious
murderous
nasty
satanic
sinister
wicked