You can view a step by step breakdown over in the reddit thread, or just cut straight to the instructions by clicking here
The biggest drawbacks are the cost and blacks general lack of support for Clue tokens it uses them here and there, but nothing like blue or red
Contrary to the early hype, I think Kroxa, Titan of Deaths Hunger might be the more broken of the two
The people expecting Xenagos to stay at $40 were betting on a two-color planeswalker being so good that it would see play as a four-of in multiple tier 1 decks, which never seemed likely to me
Tezzerets Gambit keeps our hand full, acting as a sort of colorless Divination with a proliferate tacked on top, which is obviously great at charging up our artifacts
It doesn't hold a candle to Umbreon VMAX (Moonbreon) or Umbreon ex from Prismatic Evolutions, however, as both cards sell for over $1,000, ungraded