Mechanics
Urza's Destiny expanded further on some of the mechanics introduced in Urza's Saga.
Several creatures and enchant creatures trigger various abilities when put into a graveyard from play. Famous examples of this mechanic include Pattern of Rebirth, Academy Rector, and Gamekeeper.
Some permanents have the ability to be sacrificed for 2 mana to draw a card, like a cycling ability for cards in play that are no longer useful. Three creatures have this ability in addition to a "graveyard from play" ability. Yavimaya Elder is the most popular, a small green creature that can put three cards in its controller's hand.
There is a class of spells that become more effective as a result of the number of cards of a certain color the caster reveals from his/her hand, as well as a cycle of creatures with abilities that emulate those spells.
Yet another noteworthy aspect is that Urza's Destiny was the first Expert-level set to be printed under the then-new 6th Edition rules changes; the most notable change seen on cards is the text of creatures. Whereas a card like Llanowar Elves would be given "Summon Elf" in previous sets, it would now be given "Creature - Elf".
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Famous quotes containing the word mechanics:
“the moderate Aristotelian city
Of darning and the Eight-Fifteen, where Euclid’s geometry
And Newton’s mechanics would account for our experience,
And the kitchen table exists because I scrub it.”
—W.H. (Wystan Hugh)