The answer is If an effect allows you to put a card with particular characteristics onto the battlefield without instructing you to play or cast it, you consider only the characteristics of a modal double-faced card's front face to see if that card qualifies
When instructed to amass, you may put +1/+1 counters on any of your Army creatures, and you may choose a different one each time
Players will put their best paws forward, fighting alongside mice, frogs, bats, birds, and myriad other critters to restore the balance of peace-and prove bravery comes in all sizes
The Best Doctor Who Commander Deck For Value Timey-Wimey's killing it in the value department
But you cant copy your opponents stuff, which limits its potential
If you find yourself adding too many cards, consider scaling back to get that competitive edgeand a better shot at drawing the card you need when you need it.