Crawling Claw would seem to work just fine. Reskin it to 5 tentacles jutting from a slimy ball of goo or simple lump of flesh instead of fingers/a hand. No eyes - though it perceives its surroundings just fine, no mouth -communicates with its warlock via telepathy, etc... Moves around like a hand...but not a hand.
"The hate, jealousy, or greed that drove that person to murder lingers on...amplified by the claw's torturous fragmented state." becomes, "The hate, jealousy and greed that drives a person to murder is amplified in the tentacles' torturous fragmented state [separated from its Far Realm origin]."