You may cast one spell per day with a greater range than normal without special preparation.
Benefit: Once per day, you may apply the Enlarge Spell feat to any spell you cast, without increasing the level of the spell or specially preparing it ahead of time. You may still use the Enlarge Spell feat normally, if you have it.
Source: Complete Arcane, no page number. This feat was referred to on pages 11, 14, and 205, but no description of the feat was included. The mention of it on page 14 said it was supposed to be in Chapter 3, but it isn’t. This omission wasn’t noted in the errata for Complete Arcane, either. The actual text shown here is from its earlier publication in the Miniatures Handbook, page 28. That is a version 3.0 text so it will be attributed to Complete Arcane, which was supposed to have it but didn’t.