Choose one —

• Counter target spell with mana value less than or equal to the number of cards in its controller's graveyard.

• Destroy target creature with mana value less than or equal to the number of cards in its controller's graveyard.

Whenever a player casts a blue spell, you may pay . If you do, target player mills two cards.

: Tap Drudge Sentinel. It gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Coven — Choose target creature you control and target creature you don't control. If you control three or more creatures with different powers, put a +1/+1 counter on the chosen creature you control. Then the chosen creatures fight each other. (They each deal damage equal to their power to the other.)

When Dueling Coach enters, put a +1/+1 counter on target creature.

, : Put a +1/+1 counter on each creature you control with a +1/+1 counter on it.

Flash

When Dueling Rapier enters, attach it to target creature you control.

Equipped creature gets +2/+0.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

When Duelists' Convocation International enters the battlefield, choose a 10-digit number at random and write it down.

Whenever you play a land or cast a spell, if it shares a mana value with one or more uncrossed digits in the chosen number, cross out one of those digits and draw a card. Then if all ten digits are crossed out, you win the game.

, Tap an untapped Desert you control: You gain 1 life.

Landfall — Whenever a land you control enters, if you don't control a Ring-bearer, the Ring tempts you.

Whenever Durnan attacks, look at the top four cards of your library. You may exile a creature card from among them. Put the rest on the bottom of your library in any order. For as long as that card remains exiled, you may cast it. That spell has undaunted. (It costs ​ less to cast for each opponent.)

Choose a Background (You can have a Background as a second commander.)

Enchant creature

You control enchanted creature.

Enchanted creature gets -3/-0 and loses all abilities.

Aftermath (Cast this spell only from your graveyard. Then exile it.)

Exile any number of target creatures that have -1/-1 counters on them.

, : Destroy target nonbasic land.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

, : Destroy target nonbasic land.

Dwarven Ruins enters tapped.

: Add .

, Sacrifice Dwarven Ruins: Add .

Enchant creature

Enchanted creature gets -6/-0.

When enchanted creature blocks, destroy it. (The attacking creature remains blocked.)

Enchant creature

When enchanted creature dies, target player discards two cards.

Haste

You may activate abilities of other creatures you control as though those creatures had haste.

: When you next activate an ability that isn't a mana ability this turn by spending four or more mana to activate it, copy that ability. You may choose new targets for the copy.

When Earsplitting Rats enters, each player discards a card.

Discard a card: Regenerate Earsplitting Rats.

At the beginning of your upkeep, sacrifice Earthlink unless you pay .

Whenever a creature dies, that creature's controller sacrifices a land of their choice.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

, : Destroy target green creature.

Exile target creature or planeswalker. Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Flying

When Echo Inspector enters, it connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Creature tokens you control have menace.

Whenever you attack a player, choose target nontoken creature that's attacking that player. Create a token that's a copy of that creature, except it's 1/1. The token enters tapped and attacking that player. Sacrifice it at the beginning of the next end step.

Target creature and all other creatures with the same name as that creature get +2/+2 until end of turn.

You may have Echoing Deeps enter tapped as a copy of any land card in a graveyard, except it's a Cave in addition to its other types.

: Add .

Return target creature card and all other cards with the same name as that card from your graveyard to your hand.

Return target nonland permanent and all other permanents with the same name as that permanent to their owners' hands.

Return target creature card from your graveyard to the battlefield.

When you discard Edgar's Awakening, you may pay . When you do, return target creature card from your graveyard to your hand.

Edgewall Inn enters tapped.

As Edgewall Inn enters, choose a color.

: Add one mana of the chosen color.

, , Sacrifice Edgewall Inn: Return target card that has an Adventure from your graveyard to your hand.

Prevent all damage that would be dealt to you and creatures you control this turn by creatures.

Double strike

Whenever Efreet Flamepainter deals combat damage to a player, you may cast target instant or sorcery card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

At the beginning of combat on your turn, target creature you control gets +2/+0 until end of turn.

Flying, first strike

Equipped creature gets +1/+0.

When equipped creature deals combat damage to a player, unattach Elbrus, the Binding Blade, then transform it.

Equip

Whenever you cast a Spirit or Arcane spell, reveal the top three cards of your library. Put all land cards revealed this way into your hand and the rest on the bottom of your library in any order.

Soulshift 2 (When this creature dies, you may return target Spirit card with mana value 2 or less from your graveyard to your hand.)

Electrodominance deals X damage to any target. You may cast a spell with mana value X or less from your hand without paying its mana cost.

Create a 4/4 blue and red Elemental creature token.

Target land you control becomes a 4/4 Elemental creature with haste until end of turn. It's still a land. It must be blocked this turn if able.

Vigilance

If a permanent entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Permanents entering don't cause abilities of permanents your opponents control to trigger.

Destroy target creature or planeswalker with mana value 3 or less.

Investigate. Creatures your opponents control get -2/-0 until end of turn. If any of them are suspected, they're no longer suspected. (To investigate, create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

When Elite Instructor enters, draw a card, then discard a card.

Flying

When Elite Spellbinder enters, look at target opponent's hand. You may exile a nonland card from it. For as long as that card remains exiled, its owner may play it. A spell cast this way costs more to cast.

At the beginning of each player's upkeep, that player exiles a card at random from their hand. The player may play that card this turn. At the beginning of the next end step, if the player hasn't played the card, they put it into their graveyard.

For each opponent, you create a token that's a copy of up to one target creature that player controls.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

You may look at the top card of your library any time.

You may cast noncreature spells from the top of your library. If you cast a spell this way, you may cast it as though it had flash.

Whenever Elvish Mariner attacks, scry 1.

Whenever you scry, tap up to X target nonland permanents, where X is the number of cards looked at while scrying this way.

You may exert Emberhorn Minotaur as it attacks. When you do, it gets +1/+1 and gains menace until end of turn. (An exerted creature won't untap during your next untap step. A creature with menace can't be blocked except by two or more creatures.)