Pact of the Winnower

the warlocks of this pact derive their power from the winnower as it likes to call its self others call this being some of the following names. The deep, the anomaly, and The Darkness. warlocks of this pact are few in number because of the winnower's need of death that only few have been able to match but when a being is chosen it is often for the hordes of creatures they will eventually slaughter. the winnower doesn't care what dies so long as it lives and then dies. warlocks of this type wield dark and unknown magic known only to them and the winnower.

Soulfire proficiency

You've learned how to harvest soul fire and use it to fuel your spells, temporary enhance weapons and how to heal with it 

Sword logic

Your patron has showed you the way of the blade and a new way it can be used by forming a link with it when the link is formed the sword is covered in a chitin esc material everywhere except for the blade you can only be linked to on blade at a time to link with a blade you must meditate for an hour with it

Vitality corrosion

You corrupt your foes own vitality and turn it against them this ability can be spread to others

Dark summoning

You've learned how to summon and command thrall, acolytes, knights, and wizards they work on your initiative and can not harm you, you preform their actions on their turn

Throne world

your cosmic slaughter has granted you the ability to tear open reality and travel to your throne world. enemies that have access to 5th lvl spell casting that roll equal to or above your spell save may reopen the portal