Mulligans
General Mulligans
You want to choose cards that will help you flood the board quickly. Turn one Innervate > Addled Grizzly can be a strong start, especially if you can follow it up with Living Roots and a Dragon Egg.
The aim of this deck is to flood the board with cheap minions that generate tokens and buff them with cards like Addled Grizzly, Power of the Wild, Mark of Y'Shaarj, Wisps of the Old Gods and Cenarius, and concrete your board with Soul of the Forest.