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While attuned to one of these items, magic power is increased. Whenever you cast a spell of 1st level or higher, you can choose one of the following affects before your roll:

Power: You roll one additional damage die on a hit

Potency: You gain +3 to your spell save DC

Precision: You gain +3 to hit on a ranged or melee spell attack

Persistence: The spell’s duration is doubled.

Notes: True