Grenade Spell
Installs a burst spell with Reflex save into a held grenade; creatures in the grenade's Area Fire are affected by the installed spell using the same Reflex save result, no addition...
You deliver your spells with a bang. If your next action is to Cast a Spell with a burst effect that requires a Reflex save, the spell doesn't immediately take effect—instead it's installed into a held grenade. Until the end of your next turn, creatures caught in the Area Fire of the grenade are also affected by the installed spell (no separate Reflex save; they use the same result from the grenade).
Jailbreak You can install any spell into a grenade; creatures roll a separate save against your spell DC if it's not a Reflex save. If you apply this to a spell with a basic Reflex save, you can use your spell DC instead of your class DC for the grenade.