a color of mana and the green sun, which has long been absent, returns to the sky as part of this set's storyline. Fifth Dawn adds a new twist to artifact theme of Mirrodin and Darksteel: it encourages using colored mana for playing artifact spells, via the Sunburst mechanic (see below). Fifth Dawn introduced an enhanced design for artifact cards, which uses a darker inner border to help players distinguish artifacts from white cards. Fifth Dawn theme decks contained a few reprints from Mirrodin and Darksteel with the improved card face. Mechanics Mirrodin introduced a number of new mechanics, including Equipment, Affinity, Imprint and Entwine. The artifact subtype Equipment, which has become a staple of Magic, represented weapons, clothing and armor that could be wielded or worn by creatures. Equipment functions like the older "Enchant Creature" cards (now called Auras) in that they provide some effect while attached to the creature. Unlike Auras, however, Equipment can only be attached to creatures you control in most cases, and remain in play even if the creature they were attached to leaves play. Affinity reduces the total cost of the spell by the number of permanents in play of a certain type, which in the case of Mirrodin was always artifacts or basic land types. Entwine was an optional cost on modal instants and sorceries, which allows a player to choose all effects (rather than only one) if the Entwine cost was paid. The Imprint keyword allowed an artifact to gain additional effects if another card is exiled and imprinted on that artifact. Mirrodin also had an infamous cycle of artifact lands. Darksteel continued the Equipment, Affinity, Imprint and Entwine mechanics, and introduced the indestructible and modular keywords. Something that is or has indestructible can't be destroyed by damage or "destroy effects". In Darksteel, indestructible cards (all of which were artifacts) are made of the titular metal, though other things have been deemed indestructible when it became a common mechanic in later sets (similar to Double Strike, introduced in the Onslaught). Modular was a keyworded ability of artifact creatures, these creatures would come into play with a set number of counters and, upon the destruction of that creature, could transfer them to another artifact creature. Modular was part of a larger theme of charge counters on artifacts throughout the set. Fifth Dawn introduced the Sunburst and Scry mechanics. Artifacts with Sunburst get +1/+1