The reason for not writing the high stats as original stats is both to constrain them within the long-standing design choice to keep monsters' maximum original stats under 5,000, and also because actually writing these stats, as is the case with the Don Thousand/Monster B and Don Thousand/Monster C cards in the Boss Duel event, would squeeze the number font to comically narrow widths
Bone can't sub for either of Dark's Materials, however
Firstly, because starting a new turn as the Archenemy means you get to set a new Scheme in motion
As a whole, this card packs a punch and looks fantastic as a part of any collector's binder
If your deck is not a go wide deck, the final chapter acts as additional card advantage by setting your opponents back
Monk Class decreases the cost of the second spell you play each turn and gives you some great card advantage on level 3