You summon a fiend from the Void. You choose the fiend, and it must be of CR 5 or lower. It appears in an empty space that you can see, and it disappears when it drops to 0 HP, or if the duration of the spell ends.

Roll Initiative for it. When you summon it, and on each of your turns, you can issue a verbal command to it (requires no action from you). If you issue no command, it defends itself to the best of its ability, usually attacking creatures who have been hostile.

At the end of the fiend's turns, it makes a CHA saving throw against your spell save DC. It has Disadvantage if you say its true name. On a success, your control over the fiend ends and it spends its turns however it wishes. On a failed save, it can’t attempt to repeat the saving throw until after a minute has passed.

If you stop concentrating, an uncontrolled fiend doesn't disappear for 3d6 minutes if it still has HP.

As part of the casting, you can make a circle on the ground with the blood used for casting this spell. The circle is 2m in radius, and the fiend cannot cross or harm the circle, or target anyone in it.

At Higher Levels: Increase the CR by 1 for each spell level increase.