Summon Fiend

From Tasha's Cauldron of Everything, page 112.

Description
6th-level conjuration


 * Casting Time: 1 action
 * Range: 90 feet
 * Components: V, S, M (humanoid blood inside a ruby vial worth at least 600 gp)
 * Duration: Concentration, up to 1 hour

You call forth a fiendish spirit. It manifests in an unoccupied space that you can see within range. This corporeal form uses the Fiendish Spirit stat block. When you cast the spell, choose Demon, Devil, or Yugoloth. The creature resembles a fiend of the chosen type, which also determines some of the traits in its stat block. The creature disappears when it drops to 0 hit points or when the spell ends.

The creature is an ally to you and your companions for the spell's duration. In combat, the creature shares your initiative count, but it takes its turn immediately after yours. It obeys verbal commands that you issue to it (no action required by you). If you don't issue any, it takes the Dodge action and uses its move to avoid danger.

At Higher Levels: When you cast this spell using a spell slot of 7th level or higher, use the higher level wherever the spell's level appears in the stat block.

Learned By

 * Classes: Warlock (OCF), Wizard (OCF)
 * Subclasses: Cleric (Arcana Domain)