Conjure Elemental

You summon a creature from the Elemental Planes. This creature uses the statistics of a conjured elemental creature (detailed below) with certain traits determined by your choice of its type: air, earth, fire, or water. The creature is friendly to you and your companions and takes its turn immediately after yours. It obeys your verbal commands. Without such commands, the creature only defends itself. The creature disappears when reduced to 0 hit points. If your concentration is broken before the spell ends, you lose control of the elemental creature, which becomes hostile and might attack you and your companions. An uncontrolled creature disappears 1 hour after you summoned it.