That would be a surprising jump: from a precon commander to a high-level competitive one
While the whole thing was a total failure (the e-Reader was never even released in Europe, yet the cards were...), some of the cards from that time are still pretty valuable
Shifting Woodland Shifting Woodland is an awesome, fairly new land from Modern Horizons 3 that excels in graveyard-focused decks
Duel Masters is also published by Wizards of the Coast (in case you didn't know) which perhaps explains why the reference in this case is able to be so on the nose
Expel the Interlopers and Talion, the Kindly Lord From the very beginning of Magic , there have been X spells where you can choose how much mana goes into the mana value, affecting the size of the effect, but there's a similar design we haven't used much, what I'll call the "choose a number" mechanic