mtg what are commander decks Magic the Gathering - Secrets of Strixhaven Magic cards10 double Starter Commander Decks (WeeklyMTG) :

The more aggressive your deck is and the lower your curve is, the fewer lands you need and vice versa

Scion of the Ur-Dragon Scion of the Ur-Dragon marks our foray into the 5-color commanders, which tend to be some of the best dragons in the game

He emphasizes tradeoffs, synergy with land and graveyard themes, and bracket-aware inclusion, urging deckbuilding while balancing budget, table expectations, consistency, and commander fit

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It just is not efficient enough...yet

But a comment from Magic's head designer Mark Rosewater implies that the Eldrazi in this deck are more bound than its title suggests