Needs review
Source: Player's Handbook

Description: You can cast a spell with a moment's thought.

Prerequisites:

Required for: Automatic Quicken Spell, Multispell, Spell Opportunity

Casting a quickened spell is a free action. You can perform another action, even casting another spell, in the same round as you cast a quickened spell. You may cast only one quickened spell per round. A spell whose casting time is more than 1 full-round action cannot be quickened. A quickened spell uses up a spell slot four levels higher than the spell's actual level. Casting a quickened spell doesn't provoke an attack of opportunity.