You have strengthened your demonic heritage by consorting with demons.
Benefit: A number of times per day equal to 1 + your Charisma modifier, when you cast a summon monster spell to summon a demon or an animal with the fiendish template the spell’s casting time is 1 full-round action rather than 1 full round. (Creatures so summoned can only take a standard action in the round in which they are summoned.) An abyssal-born sorcery spell uses up a spell slot equal to that spell’s actual level.
Special: Applying both the Abyssal-Born Sorcery and Quicken Spell metamagic feats to a summon monster spell to summon a demon or an animal with the fiendish template lowers the casting time to a swift action. Creatures summoned in this manner are still restricted to a single standard action on their first turn.