Enchant Eldritch Feather

You've learned how to manipulate the eldritch energy of your feathers.  Choose one of the following damage types: acid, cold, fire, lightning, or thunder. For the duration, all of your eldritch feather's spells and effects have a +1 bonus to attack rolls and deals an extra 1d4 damage of the chosen type for each feather that hits.

At Higher Levels. When you cast this spell using a spell slot of 4th level, the bonus to attack rolls increases to +2 and the extra damage increases to 2d4. When you use a spell slot of 5th level or higher, the bonus increases to +3 and the extra damage increases to 3d4.