Until end of turn, target creature gets +X/+X, where X is the number of differently named lands you control.

Flash
Flying

Lifelink
When Gloomy Meteorologist enters, it acclimates.
Whenever an ability of a Weather you control triggers, Gloomy Meteorologist deals 1 damage to target player or planeswalker.

When Gnosa, Research Executive enters, gain control of target nonland permanent until the end of your next turn. Untap it.
Each permanent you control but don't own must be the targets of spells its owner casts if able.

When Go Solo enters, sacrifice any number of creatures. Draw a card for each creature sacrificed this way.
As long as you control exactly one creature, that creature gets +2/+2 and has deathtouch and lifelink.

Target creature you control gains protection from the color of your choice until end of turn.
Scry 1.

Before equipped creature would assign, deal, or be dealt damage, sacrifice Gold Berry. If you do, equipped creature gets +2/+2 until end of turn.
When you sacrifice Gold Berry, create a Berry token and a Treasure token.
Equip {1}

When Golden Age enters, you may sacrifice a land. If you do, search your library for a land card, put it onto the battlefield, then shuffle.
You've cast a multicolored spell this turn.

At the beginning of combat on your turn, if you've spent at least five mana to cast spells this turn, put a +1/+1 counter on Goldrune Scribe.

When Gone Pickin' enters, exile up to one target nonland permanent an opponent controls until Gone Pickin' leaves the battlefield. Then create a Berry token. You may attach it to a creature you control.

Look at the top seven cards of your library. You may put an artifact card, a creature card, an enchantment card, a land card, and/or a planeswalker card from among them onto the battlefield. Put the rest on the bottom of your library in a random order.

This spell costs {3} more to cast if it's your turn.
Target creature gets -2/-2 until end of turn. If it's your turn, it gets -5/-5 until end of turn instead.

Enchant creature
When Grasp of the Yeti enters, you may destroy target creature with flying, artifact, or enchantment.
Enchanted creature gets +3/+3.

Flash
When Grasping Ancient enters, exile up to one target instant or sorcery spell.
Whenever Grasping Ancient attacks, you may cast the exiled card without paying its mana cost.
Spellcharge 4

Landfall — Whenever Grassroots Campaigners or a land you control enters, make a pledge.

At the beginning of combat on your turn, put a +1/+1 counter on equipped creature.
Equipped creature has flying as long as it has two or more +1/+1 counters on it.
Equipped creature has double strike as long as it has four or more +1/+1 counters on it.
Equip {2}

When Gray Merchant of Asphodel enters, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way.

Whenever Grazing Yaks becomes tapped, if you have at least 3 life more than your starting life total, put a +1/+1 counter on it.
{T}: You gain 1 life.

When Grim Physician dies, target creature an opponent controls gets -1/-1 until end of turn.

Search your library for a basic land card, put it into the battlefield tapped, then shuffle. If this spell's flashback cost was paid, search your library for a land card rather than a basic land card.
Flashback—{G}, Sacrifice a land.

Amity — Whenever you attack with Growing Gecko and exactly one other creature, they both get +1/+1 until end of turn. When Growing Gecko deals combat damage to a player this combat, you may transform it.

Favored
Legendary creatures you control have trample.

When Gubernatorial Fundraiser enters, make a pledge.
Whenever you spend three or more colors of mana to cast a spell, create a Treasure token.

Flash
Gulping Meqmaw's power is equal to the total number of permanents with flash you control and instant cards in your graveyard.
Whenever you cast a spell during an opponent's turn, mill two cards.

Lifelink
Pay the equip cost of an Equipment you control: Return Gutwrenched Martyr from your graveyard to the battlefield with a finality counter on it. Attach that Equipment to it. Activate only as a sorcery.