Upgrading a preconstructed-style deck built around a commander starts with the commander's real text. Ulalek, Fused Atrocity is a mythic...
Upgrading a preconstructed-style deck built around a commander starts with the commander's real text. Ulalek, Fused Atrocity is a mythic Legendary Creature — Eldrazi from Modern Horizons 3 Commander, mana cost {C/W}{C/U}{C/B}{C/R}{C/G}. Its rules text reads: "Devoid (This card has no color.) Whenever you cast an Eldrazi spell, you may pay {C}{C}. If you do, copy all spells you control, then copy all other activated and triggered abilities you control. You may choose new targets for the copies. (Mana abilities can't be copied.)" It is legal in Legacy, Commander.
First, understand the stock deck's plan
Precon-style lists around this commander are built to teach the theme — colorless and Eldrazi spells — at a friendly power level: a bit of everything, a few pet cards, and mana bases that prize variety over consistency. That makes them perfect upgrade candidates, because the cuts are rarely about bad cards; they are about roles the deck has too many of.
The cuts, by role
Cut by role, never by vibes. The usual surplus: the third and fourth 'win-more' payoffs that only work when you are already ahead; expensive spells that duplicate what your commander already does; and lands that enter tapped without a payoff for it. Replace each cut with the same slot's better version — a payoff for a stronger payoff, a tapped land for a fixing land — so the deck's shape survives the upgrade.
The adds, by role
Add in this order: interaction first (precons are famously light on removal), then card draw tied to the theme, then protection for the commander, and only then extra payoffs. Every add in this guide is chosen from real cards whose text you can verify in the MTGBrew card database — and the whole upgraded list can be rebuilt in MTGBrew's AI deck builder, which will refuse to let the list exceed the upgrade budget you set.
A sensible upgrade budget mindset
Upgrade in passes, not in one order: ten focused swaps teach you more about the deck than forty. Play the deck between passes, note which role actually failed in real games, and let that — not a shopping list — choose the next ten cards.
Build it yourself
Every card in this article is a real card you can look up in the MTGBrew card database, with its current text and legality. When you are ready to turn the idea into a list, MTGBrew's AI deck builder builds around your commander, your colors, and — as a hard rule — never over the budget you set. Save the list to your collection on MTGBrew and tune it from there.
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