Cost
Source: Elemental Master's Handbook, p. 6
Feat or 3rd-level bard spell known. Effect: Up to one ally per bard level gains the benefits of haste while you maintain this masterpiece, except the bonus to AC and on attack rolls and Reflex saves is one- fifth of your bard level. These allies must be within 60 feet of you to receive this benefit. When you cease performing this masterpiece, any creature that received this benefit for at least 3 rounds must succeed at a Fortitude save at this masterpiece’s DC or be fatigued for twice as many rounds as they were affected.