Oath of ragnarok

Upon taking this oath you devote yourself to imbody the cycle of rebirth and becoming better than you were before.

A paladin who takes such an oath understands that, the current world isn't the end and must end for a better and brighter future to take shape.

The paladins who take on such an oath know that the rest of the world isn't prepared to take on such an undertaking, and so the shoulder the responsibility.

Channel divinity

When you take this oath at 3rd level, you gain the following two Channel Divinity options. See the Sacred Oath class feature for how Channel Divinity works.

-Berserker smite: As a reaction when expanding a use of your channel divinity to add and extra 2d8, onto a single divine smite.

-Ferocity of garm: As a bonus action you impower yourself with the Ferocity of the wolf garm, in doing so for 1 minute if you do resistant damage it becomes normal damage, and if the target has immunity to your damage it instead becomes resistant.

Aura of Hel

Starting at 7th level, you emanate a aura if you aren't incapacitated granting  all allies within 10 feet of you including yourself gain a damage bonus equal to your Charisma modifier. 

At 18th level, the range of this aura increases to 30 feet.

Battle to the death

Starting at 15th level, you may enter a state of pure adrenaline rush granting you resistance to bludgeoning, piercing and slashing from nonmagical attacks aswell as cold, lighting and poison damage for the next minute.

This can be used a number of times, equal to your proficiency bonus.

Bringer of ragnarok

At 20th level you become strong enough to be considered the bringer of ragnarok.

You can as a bonus action for one minute cause an aura to surround yourself equal to 50ft, any hostile in the aura must make a constitution saving equal to your paladin dc, they take 4d8 poison damage plus 4d8 lighting damage and are knocked prone, on a successful save take half as much damage and aren't knocked prone.