The Flame of Frenzy

The yellow flame of frenzy bursts forth from your eyes. All creatures in a 20-foot cone in front of you must succeed on a Dexterity saving throw or take 3d6 fire damage and must make a Wisdom saving throw. On a failed save a creature has -3 on saving throws against madness for the next minute, or until it succumbs to madness. If the creature fails the saving throw by 5 or more, it succumbs to madness.

Condition: Madness

• A creature that becomes affected by madness takes fire damage equal to twice their CR or level (minimum of 1). This damage cannot be reduced or ignored in any way. If the creature possesses spell slots, it needs to roll 1d8. It expends a spell slot of level equal to the number rolled (or its highest spell slot if the number rolled is too high).
• A creature that becomes affected by madness has 15 hit points taken away and is stunned (see the condition) until the end of its next turn, the madness then ends.
• Madness cannot affect creatures that can't be charmed.