Five mana to draw four cards isnt bad, but at sorcery speed its really not what you want to spend your turn on most of the time
If you have access to a 3D printer, consider printing the card slinger
I can see logic for taking Fire // Ice, as its a flexible and efficient removal spell, but I would prefer to take Hero of Leina Tower or Lord of Extinction as a green archetypal payoff, or Satyr Wayfinder, which is one of the best green enablers
Losing life isn't something I'll be trying to do, but if I can make a token and draw a card without actually dying in the process, that's not that bad a tradeoff
Flying creatures are hard to block, and this deck takes full advantage of that
There are more than 50 total bear creature cards if we include cards from MTG Arenas Alchemy sets