Caster’s Imposition

uncommon | curse | abjuration

Source Pathfinder #182: Graveclaw
Traditions arcane,divine,primal,occult
Cast 3 actions | material,somatic,verbal
Targets 1 creature within 60 feet
Saving Throw will; Duration 1 minute

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A magical interference prevents the target from contributing to any form of cooperative spellcasting. On a failed save, the target can’t participate in any ritual unless they can cast the ritual alone, and they can’t access any spells provided by a coven or similar cooperative ability.
Heightened (4th) Increase the duration to 1 hour.
Heightened (5th) Increase the duration to 1 day.