msem-instigator

Up to two target lands you control become 1/1 black Bear creatures with deathtouch. They're still lands. (Then exile this card. You may cast the creature later from exile.)

First strike
When Frontline Descender enters, you may salvage an instant or sorcery card. (Exile one from your graveyard until this creature leaves the battlefield. Whenever this creature deals combat damage to a player, put a card it salvaged into your hand.)

At the beginning of your draw step, draw an additional card. If you control three or more artifacts, draw two additional cards instead.
At the beginning of your end step, discard your hand.

Take an extra turn after this one. At the beginning of that turn's end step, sacrifice each land you control. Whenever you cast a spell during that turn, copy it. You may choose new targets for the copy.
Exile Futuretheft.

Flying
Whenever a player casts a spell, if it isn't that player's main phase, each of their opponents may draw a card.

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.)

When Gate of Realms enters, you may search your library for a land card, reveal it, and put that card into your hand. If you do, shuffle.
{10}, {T}: Gate of Realms deals 3 damage to any target. This ability costs {1} less to activate for each different name among lands you control.

Pressure {1}{U}{U} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
Draw three cards.

Enchant opponent
Enchanted player plays with the top card of their library revealed.
Whenever enchanted player casts a spell, you may have them mill a card.

Deathtouch
When Ghastly Scorpion dies, you draw a card and you lose 1 life.

Ghost Sloop can't be blocked.
Crew 4 (Tap any number of creatures you control with total power 4 or greater: This Vehicle becomes an artifact creature until end of turn.)
Exile a creature card from your graveyard: Ghost Sloop becomes an artifact creature until end of turn.

When Gilded Merrow enters, if an opponent controls more lands than you, create a Treasure token. (It's an artifact with “{T}, Sacrifice this permanent: Add one mana of any color.”)

Flying
Whenever Giradrus enters or attacks, look at the top eight cards of your library. You may put a Dragon card from among them onto the battlefield. If Giradrus is attacking, that Dragon enters tapped and attacking. Put the rest on the bottom of your library in any order.

At the beginning of combat on your turn, create a 1/1 green Elf creature token. That token gains haste until end of turn and attacks this combat if able.
At the beginning of your postcombat main phases, if three or more creatures you control dealt combat damage to a player or planeswalker this turn, add three mana of any one color.

Glitch {2} (Remove one [restriction] for each time you pay the glitch cost.)
Draw two cards. [Then discard two cards.]

When Glimpse in the Static enters, exile target creature an opponent controls until Glimpse in the Static leaves the battlefield.
At the beginning of your upkeep, target player creates a token that's a copy of the exiled card, then exiles that token.

Resolute — At the beginning of combat on your turn, if Glisterhorn's power is greater than its base power, tap target creature an opponent controls.

Vigilance
Whenever Glittering Narwhal is dealt damage, create a Treasure token. (It's an artifact with “{T}, Sacrifice this permanent: Add one mana of any color.”)

Pressure {2}{B}{B} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
When Gloomtide Whelk enters, all other creatures get -4/-4 until end of turn.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Cycling {B} ({B}, Discard this card: Draw a card.)

When Glowskate Channeler enters, create a green Aura enchantment token named Manta's Wings attached to target creature. The token has enchant creature and “Enchanted creature gets +2/+2.”

Whenever you cycle a card, reveal the top two cards of your library. You may put a permanent card from among them into your hand. Put the rest on top of your library in any order or into your graveyard.
Cycling {2} ({2}, Discard this card: Draw a card.)

Pressure {1}{B} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
Destroy target creature.

When Goldengrain Alseid enters, you may search your library for a basic Plains card, reveal it, put it into your hand, then shuffle.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Whenever Goldtooth Slasher attacks, you may sacrifice an artifact or creature. If you do, Goldtooth Slasher gets +2/+0 and gains lifelink until end of turn.