That single word makes Stunt Double a strictly better Clone, and adds a significant amount of depth to the card
Lotleth Troll Discarding cards is one of the ways you can put creatures into your graveyard, so its pretty good that Lotleth Troll can do it to grow with +1/+1 counters
There have been many attempts to make cards like Fires of Yavimaya, but no other similar cards have proved to be any good at the tournament level
When it was originally previewed, all I could think of was but it doesnt stop the trigger from happening to your opponent, you just copy it
Flying, haste 3/3 Illustrated by Fiona Hsieh Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
Plus, his devotion to the Necrons (and black) cannot be understated