Dendar’s Delirium

You create a pact between yourself and another creature. By doing so you each become bonded with magic. Granting the creature of your choice endurance and martial prowess fueled by cursed magic. You bestow the following benefits to the target. 

• You enter a rage and become resistant to all damage except psychic and necrotic. 
• You gain 50 temporary hit points
• You have advantage on attack rolls that you make with simple and martial weapons.
• When you hit a target with a weapon attack, that target takes an extra 2d12 force damage.
• You have proficiency with all armor, shields, simple weapons, and martial weapons.
• You have advantage in Strength and Constitution saves
• You can attack twice, instead of once, when you take the Attack action on your turn. You ignore this benefit if you already have a feature, like Extra Attack, that gives you extra attacks.
• Your movement doubles 

During this spell you must make a DC 15 wisdom saving throw at the end of your turns or take 2d8 necrotic damage. 

Immediately after the spell ends, you must succeed on a DC 15 Constitution saving throw or suffer one level of exhaustion per round failed on a wisdom throw.