| Spell type | Indirect mental attack (red spell) |
| Demon requires | Pathway to Hell 2+ and Witch Spawn (you need both) |
| Mage requires | Fire Magic 4+ or Flameborn Adept (you need either) |
| Dragon requires | Celestial Sigils (using Fires of the Volcano rank) |
| Enhanced by | Witch Spawn and Flameborn Adept count as 5 ranks |
| Casting time | 3 seconds |
| Base modifiers | 25 feet range, +10 Ascendancy |
| Duration | 10 seconds, +5 second per rank (see below) |
| Enhanced mana cost | 25 mana doubles the duration and the penalties |
Fever is an indirect attack spell which targets your opponent’s body, and needs to be able to inflict mental damage to succeed (although no actual damage is inflicted). It only works on living creatures with hearts.
If your spell is successful, your opponent will suffer -5 Attack, Ascendancy, Damage and Power per rank, with your red magic applied as a percentage modifier to the Attack and Ascendancy.