Reveal the top four cards of your library. Put up to two permanent cards from among them into your hand and the rest into your graveyard. You may put land cards onto the battlefield tapped rather than your hand.
Flashback—{3}{G}, Tap an untapped Ruin you control.

Flying
Whenever a creature you control with flying deals combat damage to a player, you may pay {U/B}. If you paid {U}, draw a card. If you paid {B}, that player discards a card.

Flying, vigilance
If you would draw a card, you may exile a card from your graveyard instead. When you do, reveal cards from the top of your library until you reveal a card that shares a card type with the exiled card. Put that card into your hand, and the rest on the bottom in a random order.

Enchant creature
When Fable of Tooth and Fur enters, create three 2/2 green Wolf creature tokens.
Enchanted creature gets +1/+1 for each creature you control and gains trample.

Ward {2}
Spells and abilities you control that target Fabulous Serpent cost {2} less.
{2}{U}: Creatures you control get +1/+1 until end of turn.

Exile the top two cards of your library. You may play those cards until you next cast a spell from your hand.
Flashback {3}{R}{R}

Target creature gets -3/-2 until end of turn.

Choose one —
• Target player sacrifices a creature with the least power among creatures they control.
• Target player sacrifices a creature with the least toughness among creatures they control.

Enchant creature you control
When Fall from Nyx enters, destroy target artifact or land.
Enchanted creature gets +2/+0.

Choose one —
• Target opponent reveals their hand. You choose a card from it. That player discards that card.
• Target opponent sacrifices a creature or enchantment.

Destroy all creatures.

When Falling Ashes enters, exile up to two target cards from graveyards, then you gain 2 life.

Double strike
Whenever you attack, mill two cards. For each of the milled cards, you may cast it, then if you don't, creatures you control get +1/+0 until end of turn.

Creatures can't attack you or a planeswalker you control unless their controller pays {1} for each of those creatures beyond the first.

Flying
Whenever an artifact without a loop counter on it is put into your graveyard from the battlefield, return it to the battlefield with a loop counter on it.
{2}{U}: Remove a loop counter from target artifact.

Target player mills two cards, then mills two more cards for each card named Fathomless Dominion in your graveyard.

Deathtouch
Whenever one or more creatures die, create a Berry token.
Whenever Feasting Predator attacks, you may sacrifice a Berry. If you do, up to one target creature gets -1/-1 until end of turn and blocks this combat if able.

Defender
When Feasting Sloth enters, create a Berry token.
Feasting Sloth can attack as though it didn't have defender if it's enchanted, equipped, or has a counter on it.

Once each turn, when you activate a nonmana ability, you may put a +1/+1 counter on Feeble Fish. Then if there are three or more +1/+1 counters on it, remove them all and transform it.

Feed on the Meek deals 4 damage to target creature. Put X +1/+1 counters on up to one target creature, where X is the amount of excess damage dealt to that creature this way.

Enchant creature
Enchanted creature gets +1/+1 and has vigilance and trample.

Whenever you amp it up, put a +1/+1 counter on Ferva Sensation.
Remove two counters from Ferva Sensation: It phases out.

Mill X cards. For each land card milled this way, add {B}{B}. For each creature card milled this way, create a 2/2 black Zombie artifact creature token. For each noncreature, nonland card milled this way, draw a card.

{T}: You may look at two additional cards the next time you scry this turn.
{W}, {T}: Until end of turn, creatures can't attack you or a planeswalker you control unless their controller pays {1} for each of those creatures.

Field Laboratory enters tapped.
{T}: Add {G} or {U}.
{1}, Discard Field Laboratory: Scry 2.