Totem Pole of Ranged Undying

A totem of undying surrounded by eight logs to create a "Totem Pole", a block that can be placed, and when someone should have died within a radius of, say, fifty blocks, the totem pole will explode (not the TNT type of explosion, it just disappears) and the player gets the normal effects of a handheld totem without even having it in their inventory. And if you stack a totem pole on top of another, its range of undying increases (only one of the totem poles disappears though, not the whole stack).