You won't always be able to get both Madam Mim and Fairy Godmother to stick on the board long enough to pull this off, but with their reduced Shift cost of three and two-ink respectively, you'll likely get both of them down on the board at the same time fairly often
The other reason was that Fires of Yavimaya was in exactly the right spot on the mana curve
Except the deck has a bit of an identity crisis, with a strong token theme that seems present mostly in case a player wished to use the alternate face commander, G'raha Tia, Scion Reborn
Put X stun counters on each of those permanent and you gain X life, where X is the number of nonbasic lands you control
Lastly, we have Xantcha, Sleeper Agent, the new general within Natures Vengeance which cannot helm the deck