You utter foul words in a language you do not understand, twisting your fey magic into something darker and summoning one demon from the chaos of the Abyss.

When you do this, choose a number of wild magic dice to roll between 3 and 6. The number of wild magic rolls you make determines the power of the demon summoned (determined by DM). 

The demon disappears when it drops to 0 hit points. It acts on your turn and attacks every turn if able. 

At the end of each of the demon’s turns, it makes a Charisma saving throw. The demon has disadvantage on this saving throw if you say its true name. On a failed save, the demon continues to obey you. On a successful save, your control of the demon ends for the rest of the duration, and the demon spends its turns pursuing and attacking the nearest non-demons to the best of its ability. If you stop concentrating on the spell before it reaches its full duration, an uncontrolled demon doesn’t disappear for 1d6 rounds if it still has hit points.

As part of casting the spell, you can form a circle on the ground with the blood used as a material component. The circle is large enough to encompass your space. While the spell lasts, the summoned demon can’t cross the circle or harm it, and it can’t target anyone within it. Using the material component in this manner consumes it when the spell ends.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the challenge rating increases by 1 for each slot level above 4th.