Counter target spell. Cards in your hand that share a card type with that spell perpetually gain "This spell costs less to cast."

Commander creatures you own have "The first Dragon spell you cast each turn costs less to cast."

This spell costs less to cast for each electrical socket in a wall or floor you can see from your seat.

Gain control of target creature until end of turn. Untap that creature. Until end of turn, it gets +3/+0 and gains haste.

Flash

This spell costs less to cast for each attacking creature.

Trample

When Ancient Stone Idol dies, create a 6/12 colorless Construct artifact creature token with trample.

This spell costs less to cast if it targets a legendary creature you control.

Target creature you control deals damage equal to twice its power to target creature or planeswalker you don't control.

Cascade, cascade, cascade, cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order. Multiple instances of cascade each trigger separately.)

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Equipped creature gets +2/+2 and has menace.

Whenever equipped creature deals combat damage to a player, draw two cards. Then discard two cards unless you discard a Pirate card.

Equip . This ability costs less to activate if you have one or fewer cards in hand.

This spell costs less to cast if you control two or more legendary creatures.

Scry 2, then draw two cards.

Affinity for artifacts (This spell costs less to cast for each artifact you control.)

Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Equip costs you pay cost less.

As long as Auriok Steelshaper is equipped, each creature you control that's a Soldier or a Knight gets +1/+1.

If an opponent controls seven or more lands, this spell costs less to cast.

Flying

: Avatar of Fury gets +1/+0 until end of turn.

If you have 3 or less life, this spell costs less to cast.

Flying

Avatar of Hope can block any number of creatures.

If an opponent has no cards in hand, this spell costs less to cast.

Flying

As an additional cost to cast this spell, you may sacrifice any number of creatures. This spell costs less to cast for each creature sacrificed this way.

Each opponent sacrifices a creature of their choice. Create a 3/6 black and red Avatar creature token with haste and "Whenever this creature attacks, it deals 3 damage to each opponent."

Affinity for historic permanents (This spell costs less to cast for each artifact, legendary, and/or Saga permanent you control.)

When Banish to Another Universe enters, exile target nonland permanent an opponent controls until Banish to Another Universe leaves the battlefield.

Wurms you control get +2/+2 and have trample.

, : Create a 4/4 green Wurm creature token. This ability costs less to activate, where X is the greatest power among Wurms you control.

Each instant and sorcery spell you cast costs less to cast for each creature it targets.

Heroic — Whenever you cast a spell that targets Battlefield Thaumaturge, Battlefield Thaumaturge gains hexproof until end of turn.

Equipped creature has base power and toughness 10/10.

Equip . This ability costs less to activate, where X is the power of the creature it targets.

As an additional cost to cast this spell, you may collect evidence 6. This spell costs less to cast if evidence was collected. (To collect evidence 6, exile cards with total mana value 6 or greater from your graveyard.)

Target creature you control gets +2/+0 until end of turn. It deals damage equal to its power to target creature you don't control.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Bituminous Blast deals 4 damage to target creature.

This spell costs less to cast for each (energy counter) you've paid or lost this turn.

Haste

Whenever Blaster Hulk attacks, you get , then you may pay eight . When you do, Blaster Hulk deals 8 damage divided as you choose among up to eight targets.

This spell costs less to cast for each creature that died this turn.

Discard your hand, then draw eight cards. Blood for the Blood God deals 8 damage to each opponent. Exile Blood for the Blood God

Bloodbraid Marauder can't block.

Delirium — This spell has cascade as long as there are four or more card types among cards in your graveyard. (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Haste

When Bloodthirsty Adversary enters, you may pay any number of times. When you pay this cost one or more times, put that many +1/+1 counters on Bloodthirsty Adversary, then exile up to that many target instant and/or sorcery cards with mana value 3 or less from your graveyard and copy them. You may cast any number of the copies without paying their mana costs.

This spell costs less to cast if you control a creature with power 4 or greater.

Change the target of target spell or ability with a single target.

: Add .

Channel — , Discard Boseiju, Who Endures: Destroy target artifact, enchantment, or nonbasic land an opponent controls. That player may search their library for a land card with a basic land type, put it onto the battlefield, then shuffle. This ability costs less to activate for each legendary creature you control.

This spell costs less to cast for each enchantment you control.

This spell costs less to cast if it targets an attacking creature.

Put target creature into its owner's library second from the top.

Cascade, cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order. Then do it again.)

Call Forth the Tempest deals damage to each creature your opponents control equal to the total mana value of other spells you've cast this turn.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

You gain 4 life.

This spell costs less to cast, where X is the greatest number of artifacts an opponent controls.

Flying, trample, haste

Whenever Cavern-Hoard Dragon deals combat damage to a player, you create a Treasure token for each artifact that player controls.

This spell costs less to cast if you control a Zombie.

Tap target creature. It doesn't untap during its controller's next untap step.

Draw a card.

Affinity for artifacts (This spell costs less to cast for each artifact you control.)

Flying

When Chromescale Drake enters, reveal the top three cards of your library. Put all artifact cards revealed this way into your hand and the rest into your graveyard.

This spell costs less to cast for each permanent you control with oil counters on it.

Vigilance

When Cinderslash Ravager enters, it deals 1 damage to each creature your opponents control.

This spell costs less to cast during your end step.

Destroy target creature or planeswalker you don't control. Put a +1/+1 counter on up to one target creature you control.

Exile the top six cards of your library. You may cast up to two sorcery spells with mana value 3 or less from among them without paying their mana costs. Put the exiled cards not cast this way on the bottom of your library in a random order.

Flash

Flying

Foretelling cards from your hand costs less and can be done on any player's turn.

Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Equipped creature gets +1/+1 for each creature you control.

When a legendary creature you control enters, if there is no monarch, you become the monarch.

Equip . This ability costs less to activate if you're the monarch.

Undaunted (This spell costs less to cast for each opponent.)

Destroy two target creatures.

As an additional cost to cast this spell, you may sacrifice any number of artifacts and/or creatures. This spell costs less to cast for each permanent sacrificed this way and less to cast for each other artifact or creature you've sacrificed this turn.

Trample

Partner (You can have two commanders if both have partner.)

This spell costs less to cast, where X is your devotion to white. (Each in the mana costs of permanents you control counts toward your devotion to white.)

Flying

Flash

This spell costs less to cast for each creature that died this turn.

When Death-Rattle Oni enters, destroy all other creatures that were dealt damage this turn.

Vigilance (Attacking doesn't cause this creature to tap.)

, : Draw a card. This ability costs less to activate for each +1/+1 counter on creatures you control.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Target creature can't block this turn.

This spell costs less to cast if it targets an attacking or tapped creature.

Target creature's owner puts it on their choice of the top or bottom of their library.

During your turn, this spell costs less to cast.

End the turn. (Exile all spells and abilities from the stack, including this card. The player whose turn it is discards down to their maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

Corrupted — This spell costs less to cast if an opponent has three or more poison counters.

Draw two cards.

Exile all artifacts and creatures with mana value 3 or less. They perpetually gain "This spell costs more to cast" and "This permanent enters the battlefield tapped." For as long as each of them remain exiled, its owner may play it.

Enchant card in your hand (This Aura remains on the battlefield. If you play enchanted card or it otherwise leaves your hand, put this Aura into the graveyard.)

Enchanted card costs less to cast.

When you cast enchanted card, copy it.