Automatic Silent Spell( Complete Arcane, p. 191)
You can cast any of your lesser spells silently.
You can cast all 0-, 1st-, 2nd-, and 3rd-level spells as silent spells without using higher-level spell slots.
You can gain this feat multiple times. Each time you take it, the spells of your next three highest spell levels can be silenced with no adjustment to their spell slots. Thus, a wizard who took this feat twice could silence his 0- level through 6th-level spells with no adjustment to their spell slots. This feat doesn't increase the casting time for those spells that normally require a full-round action to cast in metamagic form (including sorcerer spells and spontaneously cast spells such as a good cleric's cure spells), but, as with the Silent Spell metamagic feat, bard spells cannot be affected by this feat.