msem-instigator

Flash

Flying
Creatures your opponents control get -1/-0.

Trample

Haste
When Gilded Gearhulk enters the battlefield, you may destroy target noncreature, nonland permanent.

Trample
Spells your opponents cast that target creatures you control cost {2} more to cast.
Whenever a creature you control attacks alone, it gets +2/+2 until end of turn.

{G}{U}: Glacier Tortoise gets +5/-5 until end of turn. Activate only once each turn.

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 the battlefield, all other creatures get -4/-4 until end of turn.

Whenever Glorybound Chorister attacks, put a +1/+1 counter on each other attacking creature you control.

Flash
As an additional cost to cast this spell, sacrifice a creature or pay {2}.
Defender

This spell costs {1} less to cast for each permanent you control that's a Dragon or a Hound.
Flying, haste
Whenever Gold Retriever attacks, abound. (You may cast a nonland card that costs less than this from your hand without paying its mana cost.)

Motivate 2 (When this creature enters the battlefield, you may motivate target creature with less power than this by putting two +1/+1 counters on it.)
Each creature you control with a +1/+1 counter on it has trample.

Flying, vigilance
When you unveil Graced Theurge, draw a card.

Flying
Grandstanding Huma can block only creatures with flying.
{2}{R}{R}, Exile three instant and/or sorcery cards from your graveyard: Return Grandstanding Huma from your graveyard to the battlefield tapped and attacking. Activate this ability only during your declare attackers step.

Menace

Menace
When Graygulch Outcast dies, each opponent loses 3 life.

When Greedy Insects enters the battlefield, exile up to one target artifact or enchantment until Greedy Insects leaves the battlefield.

Whenever Green Pelt Hart or another Elk creature you control deals combat damage to a player, draw that many cards.

Menace
Disgraced 1 (This enters with a -1/-1 counter. Whenever it deals combat damage to a player, remove all -1/-1 counters from it.)

Flying, haste
Whenever Grieving Revenant attacks, it deals 1 damage to each other creature you control.

Sacrifice another creature: Grisly Rougarou deals damage equal to the sacrificed creature's power to any target.

Grizzled Den enters the battlefield tapped.
{T}: Add {R} or {G}.
{3}{R}{G}: Until end of turn, Grizzled Den becomes a Bear creature with trample in addition to its other types.
Scavenge {4}{R}{G}

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Sacrifice another creature: Grotesque Defiler gains flying until end of turn.
Whenever Grotesque Defiler deals combat damage to a player, if you're in a renaissance, that player discards a card.

When Grotto Scarab enters the battlefield, create two 1/1 green Insect creature tokens for each creature you controlled that died this turn.

Other creatures you control that are Knights or have Adventures get +1/+1.