Modern Horizons 3

You may sacrifice a nontoken blue creature rather than pay this spell's mana cost. Counter target spell.

Bestow—{R}, Collect evidence 6. (To pay this bestow cost, pay {R} and exile cards with total mana value 6 or greater from your graveyard.) Flying, ...

Spymaster's Vault enters the battlefield tapped unless you control a Swamp. {T}: Add {B}. {B}, {T}: Target creature you control connives X, where X...

At the beginning of your precombat main phase, mill three cards. Then you may pay {1} and 3 life. If you do, put a card from among those cards into...

You may sacrifice a nontoken black creature rather than pay this spell's mana cost. Each opponent sacrifices a creature or planeswalker with the gr...

Vigilance Wight of the Reliquary gets +1/+1 for each creature card in your graveyard. {T}, Sacrifice another creature: Search your library for a la...

Choose target spell, then flip a coin. If you win the flip, gain control of that spell and you may choose new targets for it. If you lose the flip,...

As an additional cost to cast this spell, pay X life. All creatures get -X/-X until end of turn.

Reach Whenever Six attacks, mill three cards. You may put a land card from among them into your hand. As long as it's your turn, nonland permanent ...

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Ward {4} Whene...

As an additional cost to cast this spell, pay X life. All creatures get -X/-X until end of turn.

Flash Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies. Copies become to...

Red spells you cast cost {1} less to cast.

{T}, Pay 1 life, Sacrifice Wooded Foothills: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle.

{T}, Pay 1 life, Sacrifice Windswept Heath: Search your library for a Forest or Plains card, put it onto the battlefield, then shuffle.

{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

As Urza's Incubator enters the battlefield, choose a creature type. Creature spells of the chosen type cost {2} less to cast.

{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

At the beginning of your precombat main phase, mill three cards. Then you may pay {1} and 3 life. If you do, put a card from among those cards into...

Counter target instant or sorcery spell unless its controller pays {1}. Storm (When you cast this spell, copy it for each spell cast before it this...

{T}, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

Choose two — • Target player creates X 0/1 colorless Eldrazi Spawn creature tokens with "Sacrifice this creature: Add {C}." • Target player scries ...

Haste Whenever Laelia, the Blade Reforged attacks, exile the top card of your library. You may play that card this turn. Whenever one or more cards...

When Chthonian Nightmare enters the battlefield, you get {E}{E}{E} (three energy counters). Pay X {E}, Sacrifice a creature, Return Chthonian Night...