Even without arcane power, you can summon minor creatures to aid you.
Prerequisite: Spellcraft 1 rank
Benefit: By performing an hour-long ritual, you can summon a single celestial or fiendish animal whose CR is no more than ½ to aid you. This creature obeys your commands to the best of its ability. The creature returns to its home plane after 1 hour or when it is slain, whichever comes first. You may never summon more than one creature a day with this ability.