The declare attackers step is the second step of the combat phase. The active player declares attackers during this step (or chooses not to attack). Then the active player gets priority and players may play spells and abilities. See rule 308, "Declare Attackers Step."
Declare Blockers
To declare blockers, the defending player chooses a set of creatures that will block and pays any costs they require to block. Only untapped creatures can block, but blocking doesn"t cause creatures to tap. Other effects may also affect whether or not a set of creatures could block. See rule 500, "Legal Attacks and Blocks."
Declare Blockers Step
The declare blockers step is the third step of the combat phase. The defending player declares blockers during this step (or chooses not to block). Then the active player gets priority and players may play spells and abilities. See rule 309, "Declare Blockers Step."
Defender
Defender is a static ability. Creatures with defender can"t attack.
Defending Player
During the combat phase, the active player is attacking and is the attacking player. As the combat phase starts, the active player chooses one opponent. The chosen opponent is being attacked and is the defending player. Creatures can attack only the defending player; they can"t attack other creatures. During phases other than combat, there is no defending player. See rule 306.3.
If the "attack multiple players" option is used in a multiplayer game, there can be more than one defending player. See rule 602, "Attack Multiple Players Option." The Two-Headed Giant variant uses different combat rules than other multiplayer variants; see rule 606.7.
Delayed Triggered Ability
A delayed triggered ability is created by effects generated when some spells or abilities resolve. See rule 404.4.
Depend On An effect is said to "depend on" another if it is applied at the same time as the other effect and applying the other would change the text or the existence of the first effect, what it applies to, or what it does to any of the things it applies to. See rule 418.5, "Interaction of Continuous Effects."
Deploy Creatures Option Some multiplayer games allow players to give creatures to their teammates. If the deploy creatures option is used, each creature has the ability "{T}: Target teammate gains control of this creature. Play this ability only any time you could play a sorcery." See rule 603, "Deploy Creatures Option."
Destroy
To destroy a permanent is to move it from the in-play zone to its owner"s graveyard. Regeneration or other destruction-replacement effects can replace this action. See rule 419, "Replacement and Prevention Effects."
Discard
A player discards a card by putting a card from his or her hand into his or her graveyard. By default, effects that cause a player to discard a card allow the affected player to choose which card to discard. Some effects, however, require a random discard or allow another player to choose which card is discarded.
Distribute
Distribute has its normal English meaning in the Magic game. If a spell or ability requires a player to distribute something (such as counters) as he or she chooses among one or more targets, or among any number of untargeted objects or players, then each of these targets, objects, or players must receive at least one of whatever is being distributed. See rules 409.1e and 310.2.
Divide
Divide has its normal English meaning in the Magic game. If a spell or ability requires a player to divide something (such as damage or counters) as he or she chooses among one or more targets, or any number of untargeted objects or players, then each of these targets, objects, or players must receive at least one of whatever is being divided. This doesn"t apply to dividing combat damage. See rules 409.1e and 310.2.
Double Strike
Double strike is a static ability that modifies the rules for the combat damage step. Creatures with double strike deal combat damage in both the first-strike combat damage step and the normal combat damage step. See rule 502.28, "Double Strike."
Draw
Draw has two meanings in the Magic game.
1. A player draws a card by putting the top card of his or her library into his or her hand. This is done as a game action during each player"s draw step. It may also be done as part of a cost or effect of a spell or ability. If an effect moves cards from a player"s library to that player"s hand without using the word "draw," the player has not drawn those cards. This makes a difference for abilities that trigger on drawing cards or that replace card draws, as well as if the player"s library is empty. See rule 423, "Drawing a Card."
2. A drawn game is a game where the game ends and there is no winner. See rule 102.4.
Draw Step
The draw step is the third step of the beginning phase. As the draw step begins, the active player draws a card (this game action does not use the stack). Then the active player gets priority and players may play spells and abilities. See rule 304, "Draw Step."
Dredge
Dredge is a static ability that functions only while the card with dredge is in a player"s graveyard. "Dredge N" means "As long as you have at least N cards in your library, if you would draw a card, you may instead put N cards from the top of your library into your graveyard and return this card from your graveyard to your hand." A player with fewer cards in his or her library than the number required by a dredge ability can"t put any of them into his or her graveyard this way. See rule 502.47, "Dredge."
Dual Land (Informal)
The Ravnica block and early Magic core sets contain "dual lands"; each of these has two basic land types. For example, Temple Garden has the land types Forest and Plains. Dual land cards have the default abilities of both basic land types and are treated as both by all spells and abilities that specifically refer to those types. However, they are not basic lands. A dual land doesn"t count as two lands while in play-it"s just one land with multiple land types.
During (Obsolete)
Some older cards used the phrase "during [phase], [action]." These abilities were called "phase abilities." In general, cards that were printed with phase abilities now have abilities that trigger at the beginning of a step or phase. "During" still appears in current card text, but only in its normal English sense and not as game terminology.
Echo