The combo card is obtained by Frank, but the weapon itself can be created and utilized by Chuck. Nevertheless, Frank is the only one who can perform this weapon's heavy attack.
Primary: Tap to make Frank or Chuck swing the Reaper back and fourth, slicing up zombies that are in their way.
Heavy: Hold to make Frank (and only Frank) pick up a zombie with the sickle-end of the Reaper, swing it over his head, slam it to the ground, and then drag it along the floor to rip it apart.
The Reaper is one of the best and most lethal weapons in the game capable of killing anything short of Hazard Units faster than any other weapon, excluding the Shotgun. This makes it the weapon of choice against some of the hardest enemies in the game such as the one and only psychopath, Harjit Singh.
It is possible that the Reaper is Frank's signature Combo Weapon since like Chuck with the Paddlesaw it was the first combo weapon that Frank appeared with.
In a gameplay video you can see a katana with a wrech icon and in a Fantastic Foto facts video you can see Frank use the sickle, so the Reaper along with the Laser Gun and Lightning Gun will make a return for OTR.
In OTR, now Frank and Chuck can both use the heavy attack for the Reaper.
Both the Reaper's name and appearance are a reference to the Grim Reaper, as the Grim Reaper is often portrayed wielding a scythe.