Mirrodin | 
| Released | October 2, 2003 | 
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| Size | 306 cards (110 commons, 88 uncommons, 88 rares, 20 basic lands) | 
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| Keywords | Affinity, Imprint, Entwine | 
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| Mechanics | Artifacts, Equipment | 
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| Designers | Mark Rosewater (lead), Mike Elliott, Brian Tinsman, Tyler Bielman, Bill Rose | 
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| Developers | Randy Buehler (lead), Brian Schneider, Henry Stern, Elaine Chase, Brandon Bozzi, and Brian Tinsman | 
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| Development code | Bacon | 
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| Expansion code | MRD | 
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| Mirrodin | 
Darksteel | 
Fifth Dawn |  
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DarksteelShield of Kaldra  | 
| Released | February 6, 2004 | 
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| Size | 165 cards (55 commons, 55 uncommons, 55 rares) | 
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| Keywords | Modular | 
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| Mechanics | Indestructible | 
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| Designers | Bill Rose (lead), Tyler Bielman, Brian Schneider, Mark Rosewater | 
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| Developers | Henry Stern (lead), Tyler Bielman, Brandon Bozzi, Charlie Catmandu, and Brian Schneider | 
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| Development code | Lettuce | 
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| Expansion code | DST | 
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| Mirrodin | 
Darksteel | 
Fifth Dawn |  
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Fifth Dawn | 
| Released | June 4, 2004 | 
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| Size | 165 cards (55 commons, 55 uncommons, 55 rares) | 
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| Keywords | Sunburst, Scry | 
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| Mechanics | 5 Colors, Cogs | 
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| Designers | Mark Rosewater (lead), Randy Buehler Jr., Aaron Forsythe, and Gregory Marques | 
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| Developers | Brian Schneider (lead), Brandon Bozzi, Randy Buehler Jr., Michael Donais, Mike Elliott, Devin Low, Henry Stern, and Worth Wollpert | 
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| Development code | Tomato | 
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| Expansion code | 5DN | 
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| Mirrodin | 
Darksteel | 
Fifth Dawn |  
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Mirrodin is the name of the Magic: The Gathering expert-level block containing the Mirrodin (October 2, 2003, 306 cards), Darksteel (February 6, 2004, 165 cards) and Fifth Dawn (June 4, 2004, 165 cards) expansion sets. The Mirrodin expansion set, as well as the rest of the block, is centered on artifacts and was only the second set to do so (from a card frequency point of view) since Antiquities. The percentage of artifact cards is much higher than in any preceding set. Each of the expansion symbols in the Mirrodin block depicts a legendary artifact: Sword of Kaldra (Mirrodin), Shield of Kaldra (Darksteel) and Helm of Kaldra (Fifth Dawn).