Warlock Subclass: Oni Patron

Make a Deal with the one of most powerful and cunning youkai

Your pact draws power from one of powerful Oni, likely Oni Deva, known as Big Four of the Mountain. They are cunning and hedonistic, but unlikely to plan your demise, instead possibly planning to make your their kin or just to have fun by causing chaos through you. Just not forget to bring them some sake as an offering.

Currently, there are two Oni, Ibuki Suika and Hoshiguma Yuugi, that are openly living Oni Devas. Suika is more likely to make a pact due to living in Gensokyo and having more magical abilities, while Yuugi lives in the Old Hell and relies more on physical strength.

Oni not from from Big Four are mostly living in Hell.

Level 3: Sake Blessing

You can drink alcoholic drinks with Bonus action to become a bit stronger. After drinking Sake or any alcoholic drink stronger than Sake, you can add your Charisma bonus once to Constitution saving throws, apart from ones related to alcohol, to attack damage, or to Spell damage.

Level 3: Oni don’t party alone

In a fight, as long as you have allies in fight and they are not down, you can use your Charisma instead of Strength for attacks that have Bludgeoning damage.

Level 3: Oni Spells

The magic of your patron ensures you always have certain spells ready; when you reach a Warlock level specified in the Oni Spells table, you thereafter always have the listed spells prepared.

Table: Oni Spells

Level 6: Bottom of the bottle

You can use a bottle or gourd with any alcoholic drink as a place to hide in for a minute. Ordinary gourds are like a 10x10 feet room when you use this ability, bottles are cramped so you can barely fit there, and powerful Magical Items, like the one your Patron may be using, have a huge winery that is brightly lit with light that seems to come from outside.

Level 10: Spellbreak

You can use a melee attack to break an ongoing spell.

While being drunk and in a radius of spell (not radius of spell’s effect, but the radius where it could have been casted), and make unarmed attack againt Spell Level * 3 AC. If you suceed, Concetration forcibly ends, and caster must throw a Constitution saving throw against you spell difficulty or get Stunned condition for 3 turns (or until they end condition prematurely).

This can be used your Proficiency Bonus number of times befere a Short Rest.

Level 14: Massacre on Mt.Ooe

You can grab a Huge or smaller creature within 5 feet of you and throw them against the nearest hard surface, disregarding their size. If enemy has a Reaction, they can try to dodge the grab with Dexterity Saving Throw (or use ability that allows them to run away, if they have one). If enemy hits the wall, they get 3d12 Bludgeoning Damage, get Prone, and get Stunned, until they complete a Constitution saving throw to wake up.

This can be used once per your Long Rest.