Conjure boiling wyrd

You call forth an plasmoid maid of boiling slime, Choose an area 10-foot cube within range. An elemental of challenge rating 5 or lower appropriate to the area you chose appears in an unoccupied space within 10 feet of it. Rises up from the ground. The plasmoid disappears when it drops to 0 hit points or when the spell ends.

The Plasmoid is friendly to you and your companions for the duration. Roll initiative for the Plasmoid which has its own turns. It obeys any verbal commands that you issue to it (no action required by you). If you don't issue any commands to the Plasmoid, it defends itself from hostile creatures but otherwise takes no actions.

This creatures existence depends on the overall stamina of the caster each minute of this creatures existence causes the caster to take 4 points of exhaustion 

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the challenge rating increases by 1 for each slot level above 5th.

Sample Elementals