msem-instigator

Gestalt (When this or another creature enters under your control, you may merge it with the one in play, keeping counters and attachments. They become the permanent on top plus all abilities from under it.)
This creature gets +2/+2 and has trample as long as it's merged with another card or token.

Lifelink

Flying
When Gilded Guardian dies, you may search your library for a legendary card, reveal it, put it into your hand, then shuffle.

Prowess
Gilded Gunman gets +1/+1 as long as you control an artifact.

Flying
Whenever a player shuffles their library, Gilded Wyvern deals 2 damage to that player.

{T}, Discard a card: Draw a card.
Unveil {2}{U}{R} ({2}{U}{R}: Transform this. Unveil only as a sorcery.)

When Ginjiro Chimei enters, you may search your library for a card with an activated ability, put it into your graveyard, then shuffle.
You may cast Ginjiro Chimei from your graveyard by paying 2 life in addition to paying its other costs.

Harmony — Target creature gains flying until end of turn.
When Glamorous Aerialist enters, harmonize. (Trigger up to one harmony of one permanent you control.)

Hexproof
You may have Glen Hunter assign its combat damage as though it weren't blocked.

Prowess
Wither (This deals damage to creatures in the form of -1/-1 counters.)

Flash
Reach
Glimmerbark Treant enters with X +1/+1 counters on it.
When Glimmerbark Treant leaves the battlefield, you gain life equal to its power.

Trial 3 (As you cast this spell, an opponent of your choice may pay 3 life. If they don't, they fail the trial.)
When Glimmering Prosecutor enters, if the trial was failed, create two 1/1 black Devil creature tokens.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Glimmerwing Trickster deals combat damage to a player, scry 2.

Flying, lifelink
Menagerie — When Gloomhollow Fluffpuff enters, if there are five or more creature types among creatures you control, you may search your library for a card named Gloomhollow Fluffpuff, reveal it, put it into your hand, then shuffle.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
{3}{G}: Gloomhollow Woodlurker must be blocked this turn if able.

Flying
Whenever an artifact you control enters, put a +1/+1 counter on Glorious Wingwright. This ability triggers only once each turn.

Attacking creatures you control have first strike.
Whenever three or more creatures you control die, Glorysinger deals 4 damage to any target.

When Goblin Arsonist dies, you may have it deal 1 damage to any target.

Haste
Encourage ({T}: Another target creature you control gets +1/+1 until end of turn. Encourage only as a sorcery.)

When Goblin Cutpurses enters, target player discards a card, then draws a card.

Prowess
{3}{R}, Sacrifice Goblin Experimenter: Return target sorcery card from your graveyard to your hand.

When Goblin Rocktosser enters, you may sacrifice a land. If you do, put a +1/+1 counter on Goblin Rocktosser.

When Goblin Sniper dies, you may pay {R}. If you do, it deals 2 damage to target opponent or planeswalker.

First strike (This creature deals combat damage before creatures without first strike.)

{T}: Target creature with power 2 or less can't be blocked this turn.