msem-instigator

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 the battlefield, 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 (This creature can't be blocked except by creatures with flying or reach.)
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

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.

Gloam Gullet gets +1/+1 and has menace as long as you own a land card in exile or in your graveyard.

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

Prismatic — Whenever you cast a multicolored spell, you may discard a card. If you do, draw a card.

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

Haste
Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)
Whenever Goblin Chariot becomes crewed, untap each creature that crewed it with mana value 1 or less. This ability triggers only once each turn.
Crew 3

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

When Godseeker Vanguard enters the battlefield, create two 1/1 green Scout creature tokens.

When Golden Grizzly enters the battlefield, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

Haste (This creature can attack and {T} as soon as it comes under your control.)
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.)

Whenever you cast a black spell, you lose 1 life.

Whenever Gorran Hunter perseveres, target creature gets -1/-1 until end of turn. (A creature perseveres when it survives damage.)

Flash
Flying

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.

Granite Sibyl enters the battlefield with three +1/+1 counters on it.
Whenever another creature enters the battlefield under your control, move a +1/+1 counter from Granite Sibyl to that creature.

Menace

Menace
Augmented — When Gravitational Ripper enters the battlefield, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, target opponent sacrifices a creature. If they can't, they discard a card.

Rapport — Whenever Grayce Blaen and at least one other creature you control become tapped, scry 1, then reveal the top card of your library. If it's a land card, you may put it onto the battlefield tapped.