Let's say you have a humble three-person free for all, your first attack gets you one additional copy of The Master, a second attack with both of those asks you what 22 is, giving you four more copies, and if your opponents can't handle that, it grows exponentially to be way more 4/3 bodies than you paid for
Make sure to include enchantments like Crucible of Fire and Call the Spirit Dragons (if you can run the five colors)
Otherwise, Purphoros, God of the Forge allows you to even more rapidly damage your opponents as you continue to generate humans on the battlefield
Id consider Aetherstorm Roc for some extra energy off making tokens and other creatures coming into play
Artifact tokens that gain life are right up controls alley and I would be shocked if they didnt provide something playable that would go right into the deck
Players will put their best paws forward, fighting alongside mice, frogs, bats, birds, and myriad other critters to restore the balance of peaceand prove bravery comes in all sizes