Help on force to use for grabbing hand

Basically i want to make a killing part killer but with hand, the killer will follow everyone and if somewone is too near then the part will grab the player and put it inside to kill it.

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But i don’t know which forces i should use to make it work properly. Any help?

You can make the killer a humanoid and for the grabbing; you can just weld the character root part to the hand of the killer.

i know i need to weld the players character but i need to know how i can make the hand move straight with the part

Animations? TweenService? Forces seems too much. Overkill.