Attemptor Gadget

At the beginning of your upkeep, if you control Attemptor Gadget, each opponent loses 2 life.
Whenever Attemptor Gadget leaves the battlefield, you lose 2 life.
{6}: Sacrifice Attemptor Gadget. Any player may activate this ability.
There'll be big changes if I succeed, but they'll be just as big if I don't.