It's possible to control a nontoken Army (perhaps a creature with the changeling ability) and, through combinations of other cards, it's possible to control multiple Army tokens
By keeping an eye on these small details, you can feel more confident about your collection
While Myrel is on the lower end of the most valuable cards now, dont be surprised if it continues to climb once The Brothers War stops being printed
This 1-mana surveil card that becomes a 3/3 with a bit of effort that gives you a lot of card selection has become a staple in Izzet tempo decks
OP14-001 Trafalgar Law is worth mentioning too, because the newer mono-red version gives Supernovas players a more technical power-swapping approach without repeating the same problems as the banned ST10 leader
Then in each player's upkeep they discard, like Bottomless Pit on a dork that wins and grows and in a madness brew too