Pollywog Prodigy is one of the most efficient card draw creatures that weve seen in years, especially since your opponents cant opt to pay their way out of it like they can with Esper Sentinel
But you can't use proxies in official competitions and events
There are three primary ways to win with tokens: You attack with enough creature tokens that your opponent cant possibly hope to block them all, You pair your token generation with Mirkwood Bats, Impact Tremors, Zulaport Cutthroat, and similar effects that drain your opponents life total as your tokens enter and leave the battlefield, or You have sacrifice outlets that let you cash in tokens to kill blockers and/or drain your opponents life, like Goblin Bombardment
The image is for illustrative purposes only
Especially because it even gains the ability to tap for mana, but this wont amount to much more than a hard-to-use 3 mana mana rock, and thats not worth a card in Limited
If a card has a big mana value, it better have a big effect