Geas

The caster compels a subject to perform—or avoid performing—a specific action.

Examples: Bringing a specific item to the caster, eating or drinking without restraint, keeping a certain fact secret.

Impossible or deadly tasks: The prescribed geas must not be impossible or directly deadly—if such a geas is cast, it rebounds and affects the caster instead.

Saving throw: The subject may Save Versus Spell to avoid coming under the spell’s effect.

If the save fails: The subject must follow the stipulated course of action or suffer gradually increasing (and eventually fatal) penalties determined by the Referee (e.g. Attack penalties, Ability Score reductions, inability to memorise spells, physical torment and feebleness, etc.).

Removing: Dispel Magic is ineffective against a geas. Remove Curse and Hex Weaving only work if the caster is 2 or more Levels higher than the caster of Geas.