Okay- LeBlanc- we all know how her passive creates a mirror image that does no damage, right? But, if you pop your passive, and Zilean ults it, it usually dies via time. But, if it doesn to damage, the clone will be resurrected and will do FULL DAMAGE. It's attacks will equal your attack damage, but Items will not apply to it.
Pick LeBlanc with a Zilean on your team.
Pop your passive
Have Zilean ult the clone
Run it into a tower and let it die
Watch it come back as a fully controllable damage tool.
(I don't think your passive will proc again, but I have yet to test it.)