Volrath, the Shapestealer can turn himself into a copy of other creatures on the battlefield. My deck wins by turning Volrath into a copy of himself.
Mairsil is known for going infinite by taking the activated abilities of creatures and artifacts. My list works by instead turning Mairsil into the ultimate combination Planeswalker.
This completely unplayable jankfest suggested by a fan uses Exchange of Words to mutate creatures onto themselves. Can you keep up with all the text-changing effects?
Preston duplicates any creature that enters the battlefield without being cast. Hey, did you know lands aren't cast?
Tired of having to buy a shiny new Equipment for every single one of your creatures? This classic deck teaches your army the value of sharing, as it attaches your Equipment to all your creatures.
If you don't like being goofy, ignoring the negative people, or taking a little bit of chance, this deck's not for you. The rest of you? We've got stickers to put on all our stuff.
Casting spells from exile is nothing new for Boros, but this Background demands we cast expensive spells from the zone to dome our opponents for huge chunks of life. My affinity for artifacts list does just that by paying pennies on the dollar for all of its cards.
Dynaheir can copy activated abilities that cost more than four — and we've got three great candidates: Embalm, Eternalize, and Encore. Activate her multiple times in a single turn and upgrade making three tokens into thirty!
This $10 Voltron deck featuring Vhal and Raised by Giants can easily make heaps of mana, smash enemies to pieces, and find an actual, legitimate home for Prismite.
For just one mana, Cadric can duplicate any legendary permanent that hits the battlefield. What if we did this with planeswalkers?
Volrath, the Shapestealer 
Mairsil, the Pretender 