Covenblight's Conjure Elemental

You summon primordial spirits that take the form of elementals and appear in unoccupied spaces that you can see within range. Choose an area of air, earth, fire, or water that fills a 10-foot cube within range, and one of the following options for what appears: 

• One Medium Elemental (challenge rating 2)
• Four Small Elementals (challenge rating 1/2)

The elementals are friendly to you and your companions for the duration, taking initiative immediately after your current turn ends. They obey any verbal commands that you issue (no action required by you). If you don't issue any commands to the elementals, they defend themselves from hostile creatures but otherwise take no actions. 

 If your concentration is broken, the elementals don't disappear. Instead, you lose control of the elementals, they become hostile toward you and your companions, and might attack. An uncontrolled elemental can't be dismissed by you, and all elementals disappear 1 hour after you summoned them.

The GM has the elemental's statistics. 

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, the amount and challenge rating of elementals you can summon increases. 

7th Level: 

• One Large Elemental (challenge rating 5)
• Two Medium Elementals (challenge rating 2)
• Eight Small Elementals (challenge rating 1/2)

8th Level: 

• Two Large Elementals (challenge rating 5)
• Five Medium Elementals (challenge rating 2)
• Twenty Small Elementals (challenge rating 1/2)

9th Level: 

• One Greater Elemental (challenge rating 9), Two Medium Elementals (challenge rating 2), and Eight Small Elementals (challenge rating 1/2)
• Two Large Elementals (challenge rating 5), Four Medium Elementals (challenge rating 2), and Twelve Small Elementals (challenge rating 1/2)