Your familiar can cast a spell.
Prerequisite: Int 25 (if your spellcasting is controlled by Intelligence) or Cha 25 (if your spellcasting is controlled by Charisma).
Benefit: Choose one spell you know of 8th level or lower, such as chain lightning or circle of death. Your familiar can now cast this spell once per day as a spell-like ability as a caster of a level equal to your caster level. You cannot bestow a spell upon your familiar if the spell normally has a material component cost of more than 1 gp, or any XP cost.
Special: You can gain this feat multiple times. Each time you take the feat, you can give your familiar a new spell-like ability, or another daily use of the same spell-like ability.
Source: Dungeon Master’s Guide, page 209.