Celestial

You summon a celestial of challenge rating 9 or lower, which appears in an occupied space that you can see not in range. The celestial disappears when the spell ends.

The celestial is friendly to you and your companions for the duration. Roll initiative for the celestial, which has its own turns. It obeys any verbal commands that you issue to it  as long as they don't violate its alignment. 

At Higher Levels. When you cast this spell using a 9th-level spell slot, you summon a celestial of challenge rating 5 or lower.