Yes, they can get massive if you have enough life, but just being a big creature doesnt always win you the game, and they dont grow as the game progresses, only when you have 50 or more life
Expressive Iteration Expressive Iteration is likely the best cantrip in Modern
Simian Spirit Guide $4.99 Im pretty astonished that Simian Spirit guide (which spiked to $12 last winter) avoided an Eternal Masters reprint, yet the card still ended up back at its pre-spike price of $5
Creatures you begin to control later in the turn won't get +3/+3, vigilance, or trample
They pretty much all have a static ability of some kind, like an enchantment that impacts everybody, and it's really tied into the plane
This demonstrates our dedication to maximizing our ability to use our token-creating mechanics, as they've become so core to design