Gula's Compulsion (5e Spell)
From D&D Wiki
|V, S, M (A cursed object worth at least 1 gp)
Through a weave of words with intent to cause woe upon a spellcasters ability to channel magic efficiently, you curse a creature you can see within range. That creature must make a Charisma saving throw. On a failed save, they become afflicted with the following effects for the duration:
- Whenever the affected creature attempts to cast a spell, it must make a Charisma saving throw. On a failed save, the spell is cast but an extra spell slot of the same level (or highest lower level, if any are available) is consumed.
- Whenever the affected creature attempts to cast a cantrip, it must make a Charisma saving throw. On a failed save, the cantrip is cast but a single spell slot of the lowest level on offer (if any are available) is consumed.
- Whenever the affected creature successfully casts a spell of 8th level or lower, that spell is treated as if it were cast using a spell slot 1 level higher regarding spells effects.
At Higher Levels. When you cast this Curse using a Spell Slot of 3rd level or higher increase the difficulty of the Curses initial & aftereffect Saving Throws by a factor of (+2) for each Spell Slot Level above the 2nd.