Its possible to control a nontoken Army (perhaps a creature with the changeling ability) and, through combinations of other cards, its possible to control multiple Army tokens
Even mono color commanders can make this excuse to enjoy fetch lands in their deck Fetch Lands in Modern, Legacy, Commander, Cube, and More There are multiple uses of fetch lands in theory, but how useful are they in practice
If you have ways to copy it, you can draw even more cards and have more deathtouchers on your side of the battlefield to make opponents feel uneasy at the idea of attacking you
Its tempting (ha!) to play Sauron, the Dark Lord as soon as possible, but its best saved for when you already have an Orc Army ready to connect with an opponent that turn
I'm not sure what the desire to play around with these sorts of effects is, because they're either immensely annoying, or they win on the spot with the right set-up