this idea came to me when I saw this on pinterest, eat

Monster/Unholy Generation:
Lasso color scale by level of evil. The color depends on the strength, type, and rarity of the monster:

(Fire Color, Type of Evil Level, Description)
Green: Spirits of deceased ordinary people 1-2 Weak ghosts, harmless, but can be frightening.
Blue: Prairie Demons 3-4 Contain wind and sand magic, capable of creating illusions.
Purple: Necromancers, witches 5-6 Control the dead, know dark spells.
Red: Vampires, horsemen of the Apocalypse 7-8 Undead with incredible strength. Vampires are fast, horsemen are almost immortal.
Black: Fallen angel / Shadow of God 9-10 The most powerful evil. The lasso cracks with tension.