The player who detonates Roots of Yggdrasil to stop both players from drawing, or the player who plays into Roots of Yggdrasil to force the activation in order to continue the game Ive seen this happen far too many times and it is why I suggest continuing playing to avoid hesitation, promote friendly gameplay, and call your opponents bluff
Losing access to green means you wouldnt get to play a beautiful foil Cartographer or any of the other green explorers, but if thats not a dealbreaker, Ive put a rough list together for this build over on Archidekt
You might think folks would prefer to buy a real gemstone with that money
Finally, well end with a more comprehensive list of anti-Burn staples, broken down by color
Humans and cycling were two great examples of previous mechanics that let you use old and new cards
The list played by Ruin000 to a positive record at a recent Magic Online Challenge exemplifies this new direction