Deep Magic Volume 2 (p.178)
Fever's Gift
2-level Divination
Casting Time: 1 action
Range/Area: Self
Components: Verbal, Somatic
Duration: Concentration, 1 minute
Damage/Effect: Buff
You infect yourself with a magical fever for the duration. While infected, you are poisoned, and you can use a bonus action on each of your turns to experience a portentous hallucination. If you do so, one friendly creature within 60 feet of you that can see or hear you has advantage on the next ability check, attack roll, or saving throw it makes before the start of your next turn.
Available for: Bard, Cleric, Sorcerer