At least, the base version shouldnt stay the most expensive card, but I expect the serialized version will be
The extra combat is nice and all, and theres a potential infinite combo if you can make Bumi into a land (Ashaya, Soul of the Wild comes to mind), but untapping your lands is the reason to run Bumi
Some cheap creature based aggro decks come unstuck in the face of medium to large dorks hitting play on the other side of the board but this one just ploughs on through
Otherwise, just go for it
Its pretty hard to keep track of all the different cards that exist in all the various types of boosters, bonus sheets, and cards from The List only appear within set boosters, not collector boosters
Shimmer Myr Fast artifacts are better than slow artifacts