Corn Reaper

The McCormick Reaper is deemed a passive creature but you've seen the bloodshed caused by their harvests. You survived their harvest be it by luck or by fate but not unscathed. You've been marked by the reaper and that mark has effected both your mind and your body. This mark has urged you towards battlefields or graves filled with souls and you began to unravel why. the markings powers seeping into you has caused you to become more like the reaper and this similarity only grows  the stronger the mark gets. 

Summon Sacrifice

You summon a number of small Cornhounds equal to your proficiency bonus that appear in  unoccupied spaces that you that you can see within 30 feet. A summoned Coonhound disappears when it drops to 0 hit points, after 10 minutes have passed, or you die. The summoned Cornhounds are friendly to you and your companions. The summoned Cornhounds take their turn immediately after yours. They obey any verbal commands that you issue to them (no action required by you). If you don't issue any commands to them, they defend themselves from hostile creatures, but otherwise take no actions. The Cornhounds use the cat statblock. .

you can use this feature again after you finish a long  rest.

Sacrificial Lamb

When you would take damage you can magically swap places with 1 willing creature that you can see within 30 feet and force them to take the damage instead.

You can use this ability a number of times equal to your proficiency bonus, and you regain all expended uses when you Finnish a long or short rest.

The Reapers Body

As an action you can assume a spectral form. While in this form you have a flying speed of 10 feet, you can hover, and attack rolls against you have disadvantage against you. You can also move through objects and creatures as if they were difficult terrain. You take 1d12 force damage if you end your turn inside a creature or an object. you stay in this form for 1 minutes or until you end it as a bonus action.

to use this feature again you must finish a long rest or kill a friendly creature.

The End Justifies The Means

When you kill a friendly creature you can restore all uses of your  Sacrificial Lamb feature. In addition for 1 minute after killing an ally all attacks you make benefit from sneak attack.

You can use this feature again after a long rest.

Cull The Heard

Your Cornhounds now use the Brown Bear Statblock but their size is changed to medium. When a creature within 30 feet of you is reduced to 0 hit points you can summon 1d6 Cornhounds, after summoning Cornhounds using this feature you can regain a number of temporary hit points equal to double the number of Cornhounds you control. As an action you can kill all willing creatures within 60 feet of you. you regain hit points equal to the collective hp of all creatures killed by this effect. If the number of hit points regained would exceed your maximum hit points they are instead converted to temporary hit points.

You can use each effect a number of times equal to your proficiency bonus, and you regain all expended uses when you Finnish a long rest.