Straight to Modern
Modern Horizons sets exist to add cards straight to Modern without passing through Standard, and the third is the most consequential of them. If you only know it by reputation, that reputation is deserved: it reshaped Modern on arrival.
Three themes carry the set (energy, Eldrazi and modified) and they define most of its archetypes. The Eldrazi are the headline, and the single most important creature type in the set.
Themes
Energy
Kaladesh's alternate resource, back and pointed at aggression. Cards generate energy counters and spend them for extra effects, which rewards decks that can bank it early and cash it in fast.
Eldrazi
The set's defining creature type and its biggest Modern impact. Large colourless threats with cast triggers, supported well enough to make Eldrazi a real deck rather than a top-end curiosity.
Modified
A creature is modified if it has a counter on it, is equipped, or is enchanted by an Aura you control. One condition covering three different build-arounds, which is why it glues an archetype together.
Where You Can Play It
Modern Horizons 3 never entered Standard, and that is the whole design of the line: these sets print straight into Modern, skipping Standard and Pioneer entirely. Both of its codes are eternal-format cards from the day they were released.
Standard was never in play for this set, so the February 2027 rotation doesn't touch it, and nothing here rotates out of Modern, Legacy, Vintage or Commander. Commons from any set are Pauper-legal; that isn't listed per set here.
Limited
Energy, Eldrazi and modified define most of the format's archetypes. Modern Horizons drafts are unusually powerful by design, because the card pool is built for Modern, not for a balanced Limited curve.
Energy
Aggro
Generates energy early and spends it on efficient aggressive threats.
Eldrazi
Big Colourless
The set's marquee theme: large colourless creatures with cast triggers.
Modified
Counters / Auras / Equipment
Counts counters, Equipment and Auras as one condition, so three different build-arounds feed the same payoffs.
Commander
Four precons under the M3C code, including an energy deck that became a popular Eldrazi alternative.
Four Commander decks
M3C
Eternal-legal precons sold alongside the set.
Building one of these into something of your own? The precon buying guide covers how to judge a deck, and the Commander deck template is the shape to build toward.
FAQ
No, and that's by design. Modern Horizons sets skip both Standard and Pioneer and go straight into Modern. MH3 cards are legal in Modern, Legacy, Vintage and Commander; the M3C Commander cards are eternal-only.
June 14, 2024, with prerelease events from June 7, under the set codes MH3 and M3C.
Three: energy, Eldrazi and modified. They define most of the set's archetypes, and the Eldrazi are the single most important creature type in it.
A creature is modified if it has one or more counters on it, is equipped, or is enchanted by an Aura you control. One condition covering three different build-arounds, which is what lets it hold an archetype together.
Because it's built for Modern rather than Standard. The card pool is designed to compete in an established eternal format, so power level is calibrated against Modern staples rather than against a rotating Standard.
All card names, art, and mechanics belong to Wizards of the Coast. Modern Horizons 3 released on Jun 14, 2024; details reflect the set as published. Sources: Wizards of the Coast set pages and release notes, Draftsim, Untapped.gg.
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