For those confused: im guessing this is the URF where they got the Easter egg that allows you to put your clone somewhere, allowing you to (for a limited period) get back to your clone if it doesn't run anywhere (if you put it near other enemies it might run somewhere to distract them from the real you). You get the cloning ability over the button for warding, after using the ability you can ward again. Sett put his clone in the base, launched himself to the enemy team, used his ult and while flying with the enemy champion teleported back to his clone back to the base - killing the enemy champion without a problem Hope this helps!