Lifelink
Whenever Empowered Revisionary attacks, if its power is greater than its base power, create a number of 1/1 colorless Soldier creature tokens equal to the difference.

Vigilance, reach
When Enduring Jentil enters, create an artifact token named Menhir with “{2}, {T}, Exile a creature or land card from your graveyard: Draw a card. You gain 2 life.”
Whenever Enduring Jentil attacks, you may sacrifice an artifact. If you do, Enduring Jentil deals damage equal to its power to target creature.

Ward {1}
Whenever one or more counters are put on Enlightened Naturalist, draw a card for each kind of counter put on it on it that it didn't have already.

Choose one. If your devotion to white is three or greater, you may choose another. The same is true for devotion to blue.
• Counter target spell.
• Target player draws a card.
• Target player gains 4 life.

Ephemeral Mire enters tapped.
{T}: Add {U} or {B}.
{4}{U/B}: Until end of turn, Ephemeral Mire becomes a 3/2 black and blue Horror creature until end of turn and can't be blocked this turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to black and blue. Activate only once each turn.

At the beginning of each combat, until end of turn, creatures you control have base power equal to the greatest base power among creatures you control and have base toughness equal to the greatest base toughness among creatures you control.

{T}: Add {C}.
{2}, {T}: For each color among permanents you control, add one mana of that color.

Enchant creature with another Aura attached to it
Enchanted creature gets +3/+3 and has trample, vigilance, and reach.

Deathtouch
Other Gorgons, Snakes, and Basilisks you control get +1/+1.
Whenever a creature with deathtouch you control deals combat damage to a player or planeswalker, create a Treasure token.

When Exemplar of Grit dies while attacking, return it to the battlefield tapped under its owner's control with a defender counter on it.
When Exemplar of Grit dies while blocking, return it to the battlefield tapped under its owner's control with a decayed counter on it.

As an additional cost to cast this spell, you may sacrifice a creature, sacrifice an artifact, and/or discard a card.
For each additional cost paid to cast this spell, you lose 1 life, draw a card, and create a 1/1 colorless Cyborg artifact creature token.

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.

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}

Destroy all creatures.

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.

Indulgence
Whenever you indulge, choose one —
• Scry 2. Each opponent loses 2 life.
• Create a tapped 2/1 black Rogue creature token with menace.
• Target creature gets -2/-2 until end of turn.

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

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.

Flooded Morass enters tapped unless you control a basic Island or a basic Swamp.

Flourishing Crevasse enters tapped unless you control a basic Mountain or a basic Forest.

Choose target card in a 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. 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

Indulgence
Whenever you indulge, you may exile target instant or sorcery card from your graveyard. If you do, cast a copy of that card without paying its mana cost.