A geas places a magical Command on a Creature to carry out some service or to refrain from some Action or course of activity, as desired by you. The Creature must be able to understand you. While a geas cannot compel a Creature to kill itself or Perform acts that would result in certain death, it can cause almost any other course of activity.

The geased Creature must follow the given instructions until the geas is completed, no matter how long it takes.

If the instructions involve some open-ended task that the recipient cannot complete through his own actions, the spell remains in effect for a maximum of 1 day per Caster Level. A clever recipient can subvert some instructions.

If the subject is prevented from obeying the geas for 24 hours, it takes a –3 Penalty to each of its ability scores. Each day, another –3 Penalty accumulates, up to a total of –12. No Ability Score can be reduced to less than 1 by this effect. The Ability Score penalties are removed 24 hours after the subject resumes obeying the geas.

A remove curse spell ends a geas spell only if its Caster Level is at least two higher than your Caster Level. Break enchantment does not end a geas, but Limited Wish, Miracle, and wish do.

Bards, sorcerers, and wizards usually refer to this spell as geas, while clerics call the same spell quest.