Buyback—Pay 3 life, Discard a card at random. (You may pay 3 life and discard a card at random in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.)

Destroy target land.

Haste

: Flowstone Hellion gets +1/-1 until end of turn.

Menace (This creature can't be blocked except by two or more creatures.)

: Flowstone Kavu gets +1/-1 until end of turn.

: Target creature gets +1/-1 until end of turn.

, Discard a card: Put a +1/+1 counter on Flowstone Sculpture or Flowstone Sculpture gains flying, first strike, or trample. <I>(This effect lasts indefinitely.)</I>

All creatures get +X/-X until end of turn.

Creatures you control get +1/-1.

Defender (This creature can't attack.)

: Flowstone Wall gets +1/-1 until end of turn.

You may play an additional land on each of your turns.

Whenever you play a land or cast a spell, draw a card if you have no cards in hand. Otherwise, discard a card.

Whenever Fludge, Gunk Guardian or another Slug, Ooze, Fungus, or Mutant enters the battlefield under your control, each opponent shuffles three Gunk cards into their library. (Gunk is a colorless sorcery card with no mana cost that has cycling .)

Defender, flying

Whenever Flumph is dealt damage, you and target opponent each draw a card.

Create two 2/3 red Minotaur creature tokens with haste.

Counter target instant or sorcery spell unless its controller pays .

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

Each player discards any number of cards, then draws that many cards.

Draw a card.

Flying

Whenever you cast an instant or sorcery spell, you may switch Fluxcharger's power and toughness until end of turn.

Flycatcher Giraffid enters with your choice of a vigilance counter or a reach counter on it.

Untap all creatures you control. They gain flying and double strike until end of turn.

Vigilance

: Add one mana of any color. Activate only if Flywheel Racer is a creature.

Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

Flash

As Focused Funambulist enters, you may put an art sticker on the empty side of the balancing pole. When you do, ask a person outside the game "Does this look balanced?" If they say yes, you may tap or untap target creature.

As an additional cost to cast this spell, sacrifice a Goblin.

Target creature gets -5/-5 until end of turn. Fodder Launch deals 5 damage to that creature's controller.

Flying

When Foe-Razer Regent enters, you may have it fight target creature you don't control.

Whenever a creature you control fights, put two +1/+1 counters on it at the beginning of the next end step.

Defender, flying

Prevent all combat damage that would be dealt to and dealt by Fog Bank.

Flying

: Regenerate Fog of Gnats.

Enchant creature

Enchanted creature is a Spirit and can't attack or block. (It loses all other creature types.)

Skulk (This creature can't be blocked by creatures with greater power.)

When Fogwalker enters, target creature an opponent controls doesn't untap during its controller's next untap step.

Counter target spell. If that spell is countered this way, its controller may put a creature card from their hand onto the battlefield.

Commander creatures you own have "Whenever you cast a spell that shares a creature type with this creature, draw a card. This ability triggers only once each turn."

Whenever Folk of An-Havva blocks, it gets +2/+0 until end of turn.

Investigate X times. (Then exile this card. You may cast the creature later from exile.)

Conjure a card of your choice from Follow the Tracks's spellbook onto the battlefield.

Whenever you pay life, put that many blood counters on Font of Agonies.

, Remove four blood counters from Font of Agonies: Destroy target creature.

, Sacrifice Font of Fortunes: Draw two cards.

Instant and sorcery spells you cast cost less to cast for each time you've cast a commander from the command zone this game.

Font of Progress enters with two oil counters on it.

, : Target player mills X cards, where X is the number of oil counters on Font of Progress.

, Sacrifice Font of Vigor: You gain 7 life.

When Food Coma enters, exile target creature an opponent controls until Food Coma leaves the battlefield. Create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

Enchant creature

When enchanted creature dies, return that card to the battlefield under your control.

When Fool's Demise is put into a graveyard from the battlefield, return Fool's Demise to its owner's hand.

Enchant land

Enchanted land has ": Target creature gains trample and haste until end of turn."

Cycling (, Discard this card: Draw a card.)

When Footlight Fiend dies, it deals 1 damage to any target.

Choose a creature type. Look at the top six cards of your library. You may reveal any number of cards of the chosen type from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in a random order.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Creatures you control get +2/+2 and gain vigilance and lifelink until end of turn.

, Sacrifice a Forest: Foratog gets +2/+2 until end of turn.

Buyback—Discard two cards. (You may discard two cards in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.)

Counter target spell.

If you would draw a card, return a card from your graveyard to your hand instead. If you can't, you lose the game.

If a card would be put into your graveyard from anywhere, exile that card instead.

Enchant land

Enchanted land has ": Target creature gets +2/+1 until end of turn."

Sacrifice a nontoken permanent. If you do, target opponent loses 2 life unless that player sacrifices a permanent or discards a card. You may repeat this process any number of times.

Forbidding Watchtower enters tapped.

: Add .

: Forbidding Watchtower becomes a 1/5 white Soldier creature until end of turn. It's still a land.

If damage would be dealt to you, put that many depletion counters on Force Bubble instead.

When there are four or more depletion counters on Force Bubble, sacrifice it.

At the beginning of each end step, remove all depletion counters from Force Bubble.