The mana cost is daunting, with double white and double blue, but a double striker with prowess ends the game quickly
While Ponder would certainly see a lot of play if it were unbanned, and powering up Izzet even more does worry me, in a world of Consider and Expressive Iteration, is Ponder really too powerful
One of the deck's most important creatures is Wildwood Scourge, a Hydra that can enter play with as many +1/+1 counters as you can afford, then gains an additional +1/+1 counter each time another one of your other creatures gains counters
This is unbelievably strong with Trafalgar Law leader you can ensure the top card of your Life is a Supernova character that Law can play with his effect
There are a lot of neat things you can do with all the Saproling creature tokens Tana will be making if she's able to hit a player
The ability for a creature to deal damage with its toughness instead of power has a name: backbone