Infernal Calling

Spell Level: Level 5

Spell School: Conjuration

Casting Time: 1 minute

Range: 90 ft

Components: V, S, M

Materials Needed: a ruby worth at least 999gp

Duration: Concentration, up to 1 hour

Castable By: Warlock, Wizard

Description

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.

Source: Xanathar's Guide to Everything