Type of Feat: Metamagic Prerequisite: Extend Spell feat, ability to cast 6th level spells. Specifics: A persistent spell has a duration of 24 in-game hours instead of its normal duration. Persistent Spell may only be applied to certain spells. Use: A persistent spell uses a spell slot six levels higher than the spell's actual level. For a list of all spells which can be enhanced by this feat, see: .