I'm am fairly new to MCreator and I would like to make an addon for a game I'm trying to make but I am having troubles

so i am trying to make an among us body system so when a player is killed it will spawn a block "a body" and then once a player brakes the body it teleports all the players to a location

i had an idea but im not quite sure how to do it, when a player is hit with an item it sets off a procedure which will teleport a block to the player that was hit then after one tick it kills the player. I'm not sure how to set this up if anyone could help i would appreciate it. thanks

if there is a better way to do this let me know