The Masochistic Monarchs

You have made a contract with a Monarch of the Underworld and grants you the ability to call forth warriors of the underworld. 

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	blindness/deafness, scorching ray
3rd	fireball, stinking cloud
4th	fire shield, wall of fire
5th	flame strike, hallow

The Monarchs Calling

At first level you gain the ability when you drop below half hp to summon one of the Monarch Guardians for 10 minutes as an action. 

Contract with the Monarch

Starting at 6th level, you can call on your patron to alter fate in your favor. When you make an ability check or a saving throw or attack, you can use this feature to re-roll to your roll. You can do so after seeing the initial roll but before any of the roll’s effects occur.

Once you use this feature, you take damage equal to the number you rolled.

The Monarchs Crown

Starting at 10th level, You gain immunity to control and charm affects and increase the dc saves of unfriendly creatures by 2 when within 30feet.  This appears as a floating ethereal blue flame crown above your head.

Obey The Monarch

Starting at 14th level, when you hit a creature with an attack, you can use your bonus action to use the the affect of the command spell.

 

you can only use this this feature 3 times per long rest.