Hellflame Cleave

Hellflame Cleave is a cantrip. It is a unique attack granted by the Hellfire Greataxe which cleaves through an area, covering it with deadly hellfire.

Description

Spew hellish flames and strike your foes.

Hellfire ignores resistance and immunity to Fire damage.

Properties

Cost:  Action
Damage: Normal weapon damage; +
2d6 (2~12) Fire
Details: DEX Save (Spell save DC) (On Save: Targets still take half damage.); AoE: 3 m / 10 ft (Cone); Creates Area: Hellfire; Recharge: Short rest

At higher levels

Casting this spell at a higher level grants no additional benefit.

Roiling Hellfire

Duration: 1 turn

Spell save DC Dexterity saving throw

6d6 (6~36)

Fire

Flames from the heart of Avernus engulf this entity, inflicting 6d6Fire damage per turn.

Hellfire

Duration: 2 turns

AoE: 3 m / 10 ft (Cone)

Deals 6d6 Fire damage per turn that ignores Resistances and Immunities.

Type: Surface

Condition: Roiling Hellfire

Granted by the following items:

Hellfire Greataxe

This weapon action does not count as an attack for the purposes of Extra Attack and requires your full  Action to use.
Instead, this is actually classified as a cantrip which results in some unexpected interactions.
- It can be Counterspelled.
- A sorcerer can apply Metamagic to it. The applicable options are Careful Spell, Extended Spell, Heightened Spell, Subtle Spell, and perhaps most importantly, Quickened Spell.
- It benefits from spell and cantrip specific damage bonuses like Elemental Affinity: Damage and Amulet of Elemental Torment.
- It activates Eldritch Knight's War Magic.
- It can still be casted while Silenced.
The Roiling Hellfire condition is applied by both the weapon action itself and the Hellfire surface it creates. Even if a target saves against the attack, it will still be inflicted with Roiling Hellfire cause by the surface.
Despite the tooltip saying that Hellfire ignores resistances and immunities, it does not. Proof - File:Rolling Hellfire Resistances.png