Discard is a keyword action.
When making an opponent discard, many effects discard cards at random, but some let the player who will be discarding decide which card to lose, while some even let the effect's controller decide on the card for the opponent by first revealing the opponent's hand. Usually, the latter effect is the most expensive option in terms of raw mana cost, and the former two effects are lower in mana cost.
Since Duel Masters allows for hand refilling as a part of making progress towards ending the game due to its shield-breaking aspect, discard can be a potent strategy to counteracting the additional cards gained by a player whose shields were broken.
To counteract the potency of discard in Duel Masters, some cards actually gain benefits or protection from being discarded or otherwise turning the typically negative effect into positive gain, for example Berlin, Bell Gravekeeper and cards with a "Madness" ability.
Certain keywords also benefit from discard, such as Soul Recall, and No Choice or creatures with Graveyard evolution. As such, Self Discards had been used to fill one's graveyard, sometimes Strike Back cards also being used for this advantage.
List of famous Card Discard cards
The following cards have an ability that triggers whenever a card is discarded (not to be confused with Discard Substitution).
- For cards that allow you to discard your opponent's cards, see Card Discard.
- For cards that allow you to discard your own cards, see Self Discard.
- For cards that can be put into the battle zone when they would be discarded, see Discard Substitution.
Awaken ● Battle ● Block ● Break ● Cast ● Charge ● Cross
Destroy ● Discard ● Dragsolution ● Expand ● Forbidden Liberate
Fortify ● Gachinko Judge ● Generate ● Gacharange Summon ● Link ● Reveal ● Seal
Search ● Shuffle ● Summon ● Switch ● Tap ● Trigger ● Upside Down ● Use
Ability ● Artist ● Card Illustration ● Card Name ● Card Number
Card Rarity ● Card Type ● Cost ● Civilization ● Mana Cost ● Mana Number
Power ● Race ● Soul ● Subtype ● Summon Cost ● Supertype
Evolution Creature ● Evolution Cross Gear ● Evolution Dragheart Creature ● Evolution Exile Creature ● Evolution Psychic Creature
Exile Creature ● Faerie Field ● Final Forbidden Creature ● Final Forbidden Field ● Forbidden Core ● Forbidden Creature
Forbidden Field ● Forbidden Impulse ● Gacharange Creature ● Giga Orega Aura ● Happiness Field ● King Cell ● Moonless Night Field
Mono Artifact ● Neo Creature ● Neo Evolution Creature ● Neo Gacharange Creature ● Orega Aura
Psychic Creature ● Psychic Field ● Psychic Super Creature ● Star Evolution Creature ● Star Max Evolution Creature
T2 Field ● Ceremony of Zeron ● Zeron Creature ● Zeron Nebula
Super Deck Zero Duel ● Start Deck Champion Finals
Adds Civilization ● Adds Race ● Alternate Win ● Alternative Cost
Attack Bend ● Basic Card ● Cantrip ● Card Discard ● Chump Block
Cost Reduction ● Clutch ● Deck Manipulation ● Degenerate ● Diamond State
Draw Engine ● Draw Lock ● Draw Source ● Draw Spell
Extra Turn ● Finisher ● Graveyard Fertilizer ● Graveyard Summon
Hand Addition ● Hand Change ● Increase Power
Infinite ● Infinite Attacker ● Infinite Blocker
Mana Acceleration ● Mana Burn ● Mana Curve ● Mana Summon
Opponent Reliance ● Peeping ● Prevents Attack ● Prevents Defeat
Reset ● Resistance ● Reverse Fury Charge ● Reverse Slayer ● Shield Addition
Shield Burn ● Shield Change ● Shield Peek
Suicide ● Skip the rest of the turn ● Trample
Unattackable ● Unblockable ● Unchoosable
Vigilance ● Win All Battles ● 3D Dragsolution
Cards that can be put into the Battle Zone at the start of the game
Blocker Based Removal ● Bounce ● Can Attack Untapped Creatures
Card Based Removal ● Decrease Power ● Fixed Removal ● Force Battle ● Mass Removal
Power Based Removal ● Reset ● Sealing ● Self Removal ● Tap In ● Tap and Destroy
Activation Cost ● Additional Cost ● Attacking Creature
Can't be destroyed ● Choose a race ● Color Accident ● Concept ● Consists of ● Counter ● Cycle
Dead Card ● Deck Building ● Deck Compression ● Designer's Combo ● Evolution Icon
Evolution Source ● Face Up ● Forced ● Gacha Figure ● Game
Game Table ● Hyperspatial Cost ● Key Card ● Limited Card ● Mode ● More than 4 of this card in your deck
Name Rule ● Optional ● Overkill ● Play ● Power Creep ● Quasi-Vanilla ● Real Cost ● Repair
Rock-Paper-Scissors ● Stop ● System Creature ● The Over Eggplant-cross
Touch ● Trivia card ● Twinpactification ● Vanilla