The Fiend: Malcanthet

Malcanthet's fiendish powers with a beguiling twists grants her warlocks special abilities to seduce, charm, and punish all that get in her way. 

Expanded Spell List

The Fiend lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Fiend Expanded Spells

Spell Level	Spells
1st	burning hands, command
2nd	calm emotions, scorching ray
3rd	fireball, glyph of warding
4th	compulsion, wall of fire
5th	flame strike, geas

Shapechanger

You can use an action to polymorph into a Small or Medium humanoid, or back into your true form. Any equipment you're wearing or carrying isn't transformed. You revert to your true form if you die.

Seducing Thought

Starting at 6th level, your patron has gifted you the ability for your thoughts to linger in the minds of your targets. You now have the ability to communicate telepathically with any creature within 60 feet. At the 12th level, The range restriction is ignored for any creature you have charmed. 

Beguiling Form

When you reach 10th level, you begin to take on the form of a succubus. Your tail is nearly as long as you are tall, with a full spike-like stinger. As a bonus action, you can use your tail to attack, doing 1d6 damage plus your dexterity modifier. Your tail has a strength of 10, (and a dexterity equal to yours) which is just enough to grasp onto something and hold you in place.  You now have huge bat wings, reaching out to a wingspan that is twice your height when you let them out.  You have a flying speed of 40 feet, as long as you are in your succubus form.  While in this form, you have resistance to fire, lightning, and poison damage.

Kiss of the Succubus

Starting at 14th level, when you kiss another humanoid that is willing, or you have charmed in any way, the victim must make a Constitution saving throw against your spell save DC.  Failure means they will take 5d10 psychic damage, or half on a successful save.  The victim's hit point maximum is also reduced by this amount, which will last until they finish a long rest. The target dies if this effect reduces its hit point maximum to 0.

Once you use this feature, you can’t use it again until you finish a long rest.