msem-instigator

When Graygulch Howler dies, you gain 1 life for each Spirit you control.

When Graygulch Lurker dies, target opponent loses 2 life.

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

Haste
Whenever a player loses life, that player gains control of Graygulch Revenant.

Flying
When Greater Swooprat enters the battlefield, creatures your opponents control get -1/-1 until end of turn.

Flying, trample
When Greedstoker Demon enters the battlefield, you lose X life and create X Treasure tokens, where X is your devotion to black. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)
You can't sacrifice more than one Treasure each turn.

When Green Daywalker enters the battlefield, you may destroy target artifact or enchantment.
Augmented — At the beginning of each end step, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on Green Daywalker.

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

Whenever Greenscale Bully deals combat damage to a player, create a Treasure token. (It's an artifact with “{T}, Sacrifice this permanent: Add one mana of any color.”)

Trample

Whenever a Hound you control is dealt damage, Greypelt Emissary deals 1 damage to any target.
Whenever Greypelt Emissary attacks, you choose how target creature blocks this combat.

Trample
Greypelt Ruffian gets +1/+1 as long as you control a storied permanent. (Enchantments and legendary permanents are storied.)

{1}, {T}: Search your library for a card named Greypelt Trooper, reveal it, put it into your hand, then shuffle. Activate only as a sorcery.

Flash
Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
When Grim enters the battlefield, if you sacrificed a permanent this turn, exile target tapped creature.

Sacrifice another creature: Grindlesnap gets +3/+2 and gains trample until end of turn if that creature was a Crocodile. Otherwise, it gets +1/+1 until end of turn.
Whenever Grindlesnap is dealt combat damage, create a 3/2 green Crocodile creature token with trample.

Rapport — Whenever Grinning Fox and at least one other creature you control become tapped, tap another target creature. That creature doesn't untap during its controller's next untap step.

When Grisly Reaper enters the battlefield, you may exile a creature card from your graveyard. When you do, create a 1/1 black Skeleton creature token.

Lifelink
When Grizzled Warpriest enters the battlefield, starting with you, each player may gain 3 life. For each opponent that does, create a Treasure token.

Menagerie — When Grotto Guardian enters the battlefield, if there are five or more creature types among creatures you control, target creature you don't control gets -2/-2 until end of turn.

First strike
Whenever Guardian of the Eclipse attacks, you may exile another target attacking creature you control, then return it to the battlefield under your control tapped and attacking.

This spell can't be countered.
Whenever one or more creatures with flying attack, upgrade Guided Sniper. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Reach
• Hexproof

Reach, trample
{1}{G}: You may remove a counter from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.

Refine {3}{W}{B} (You may cast this spell by sacrificing an artifact and paying the refine cost reduced by that artifact's mana value.)
When H-9K Prototype enters the battlefield, if it was refined, destroy target nonland permanent.

Flying
Ward—Pay 4 life.
Augmented — At the beginning of each end step, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, return HO-20 Rising Sun from your graveyard to the battlefield tapped.