Summon Greater Demon

Spell Level: Level 4

Spell School: Conjuration

Casting Time: 1 action

Range: 60 ft

Components: V, S, M

Materials Needed: a vial of blood from a humanoid killed within the past 24 hours

Duration: Concentration, up to 1 hour

Castable By: Warlock, Wizard, Rogue

Description

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.

Source: Xanathar's Guide to Everything