msem-instigator

{U}: Enduring Rockshell gets -1/+1 until end of turn.
Whenever Enduring Rockshell perseveres, draw a card, then discard a card. (A creature perseveres when it survives damage.)

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.) [1/4]
[Lore I-II] Scry 1.
[Lore III] Target creature you control can't be blocked until end of turn.

{T}: Envious Nereid deals 1 damage to target creature and 1 damage to that creature's controller.

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.) [1/3]
[Lore I-II] Until your next turn, target creature an opponent controls gets -1/-0.
[Lore III] Scry 2, then draw a card.

Embellish {6}{U} (If you cast this spell for {6}{U}, create a 1/1 blue Thopter artifact creature token with flying when it enters the battlefield.)
Whenever you attack, return any number of nonland permanents with different controllers and mana value less than or equal to the number of artifacts you control to their owners' hands.

When Fabled Chishou enters the battlefield, create a token that's a copy of it, except it doesn't have this ability.
At the beginning of each end step, if Fabled Chishou isn't in a pack, sacrifice it. (Two or more creatures you control with equal power are in a pack.)

When Faithless Deserter enters the battlefield, you may sacrifice a creature. If you do, each opponent sacrifices a creature.

When False-Cure Smuggler enters the battlefield, put a -1/-1 counter on another target creature.
{1}{U}, Sacrifice a creature: Proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

Whenever Fated Mariner attacks, forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)
{1}{U}: Fated Mariner can't be blocked this turn.

{T}: Draw a card. Activate only if you created a token this turn.

Menace
When Fenhauler Gang enters the battlefield, each player mills three cards.
Whenever Fenhauler Gang deals combat damage to a player, return up to one target creature or land card from your graveyard to your hand.

Deathtouch
Infiltrate (Whenever one or more attacking creatures you control aren't blocked, this creature gets +1/+1 until end of turn.)

Whenever Ferris, the Sapphire Storm or another creature enters the battlefield under your control, each opponent mills X cards, where X is that creature's power.

Flash
{6}: Target creature gains flying until end of turn.

First strike
Whenever Flintlock Pioneer deals damage, tap it. It doesn't untap during its controller's next untap step.

({T}: Add {U} or {B}.)
Flooded Morass enters the battlefield tapped unless you control a basic Island or a basic Swamp.

Heroic — Whenever you cast a spell that targets Floodspeaker Triton, put a +1/+1 counter on Floodspeaker Triton, then scry 1.

Flourishing Island enters the battlefield tapped.
As Flourishing Island enters the battlefield, choose a basic land type.
Flourishing Island is the chosen type in addition to its other types.

When Forest Whale dies, put a number of +1/+1 counters on target creature you control equal to Forest Whale's power.

({T}: Add {U} or {B}.)
As Forlorn Ruin enters the battlefield, you may pay {1}. If you don't, Forlorn Ruin enters the battlefield tapped.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)

At the beginning of your end step, choose one at random —
• Create a tapped Treasure token.
• Forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)
• Arm target creature you control. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)

({T}: Add {U} or {R}.)
Frostfire Geysers enters the battlefield tapped unless you control a basic Island or a basic Mountain.

When Garish Gillian enters the battlefield, tap target land an opponent controls. That land doesn't untap during its controller's next untap step.
Unveil {3}{U}{R} ({3}{U}{R}: Transform this. Unveil only as a sorcery.)

First mate—Your starting deck contains no creature cards. (If this card outside the game is your chosen first mate, you may swap it with a card in your opening hand.)
Prowess
Whenever Garth attacks, look at the top card of your library. If it's an instant or sorcery card, you may cast it. (You still pay its costs.)