Eschew Materials( Tome and Blood: A Guidebook to Wizards and Sorcerers, p. 40)
You can cast spells without material components.
Any other metamagic feat.,
An eschewed spell can be cast with no material components. Spells without material components or whose material components cost more than 1 gp are not affected by this feat. An eschewed spell uses up a spell slot of the spell's normal level, modified by any other metamagic feats.