You did
Bitterblossom itself was an enchantment, and therefore would not be destroyed by Volcanic Fallout
While he might not do much for Zombie strategies on his own, Thraximundar benefits from the resiliency of the kindred theme, since a 6/6 with haste which doesn't stay a 6/6 for long is going to be targeted down quickly
If Llanowar Scout comes out with multiple lands in hand and before a turn when Muldrotha could be cast, that is a fantastic start for this deck
If you can manage to swing three artifact creatures at three players successfully, you'll be making a 3/3 every turn, which feels pretty darn good for two mana
This is effectively a blank card if your graveyard doesnt have what you need, so the fact that you can play this mana rock on turn two doesnt really matter, because it will rarely be able to produce mana on turn two