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.

Revered
Landfall — Whenever a land you control enters, put a +1/+1 counter on this creature. Then if you control eight or more lands, double the number of +1/+1 counters on this creature.

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}

As an additional cost to cast this spell, remove a level counter from a creature you control or pay {3}.
Exile target creature or planeswalker. Surveil 2.

Destroy all creatures.

Level up {R/W}
[level 1-2] Whenever a nontoken creature you control with a counter on it dies, create a 1/1 white Citizen creature token.
[level 3+] Whenever a nontoken creature you control with a counter on it dies, create a 4/4 red Error creature token with menace.

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

Haste
Whenever a player casts a spell, if no mana from a basic source was spent to cast it, Flaw in the System deals 2 damage to that player.

Choose target card in another player's graveyard other than a basic land. Search its owner's graveyard, hand, and library for any number of cards with the same name as that card and exile them. If their library is searched this way, they shuffle it. You gain 1 life for each card exiled this way. That player draws a card for each card exiled from their hand this way.
Flashback {3}{B}

Whenever Forgotten Cultivator attacks, mill three cards. Return a permanent card from among the milled cards to your hand.
Spellcharge 4

This land enters tapped unless you control one or fewer other lands.
{T}: Add {B} or {G}.
Cycling {2}

{T}: Add {C}. You may sacrifice Fortune Bearer. If you don't, you can't spend this mana to cast a spell from your hand.
Surface {5}{U}{U}. Fortune Bearer surfaces transformed.

Flying
If a source would deal 2 or more damage to Fragile Soul, prevent that damage.

Whenever you attack, create a 1/1 colorless Soldier creature token that's tapped and attacking.

Exile target creature you control, then return that card to the battlefield under its owner's control.

Whenever Freightyard Scrappers attacks, create a Treasure token.
{X}, Sacrifice an artifact: Return target artifact card with mana value X or less from your graveyard to the battlefield. Activate only as a sorcery and only once each turn.

Create three Berry tokens, then sacrifice any number of Berries. For each Berry sacrificed this way, creatures you control get +1/+1 until end of turn.

Menace, deathtouch
When Furies of the Natural Order enters, bless any number of target players.

Search your library for a basic land card, put it onto the battlefield, then shuffle.

Target creature you control gains double strike until end of turn. It deals damage equal to its power to each of up to two other targets.

Fabric — When this enchantment enters, target player reveals a number of cards from their hand equal to the number of enchantments you control. You choose one of them. That player caches that card.
Creatures you control get +1/+1.

As an additional cost to cast instant and sorcery spells, you may pay {X}, where X is that spell's mana value. If you do, copy that spell, and you may choose new targets for the copy.
Spellcharge 4

Gates to the Underworld enters tapped.
{T}: Add {W} or {B}.
{5}{W/B}: Gates to the Underworld becomes a 3/4 white and black Construct creature with lifelink until end of turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to white and black. Activate only once each turn.

Whenever you sacrifice a nonland permanent, each opponent sacrifices a permanent that shares a card type with it.
{3}, {T}, Sacrifice another creature: Gatherer of Grievances deals damage equal to the sacrificed creature's power to target player. Activate only as a sorcery.

Whenever you draw or cache a card, put a +1/+1 counter on up to one target land.
At the beginning of combat on your turn, untap up to one target land you control. It becomes a 3/3 creature with vigilance, hexproof, and haste until end of turn. It's still a land.