msem-instigator

Whenever Fleshwarper or another Horror you control dies, each opponent loses 1 life and you gain 1 life. You may mill a card.

Heroic — Whenever you cast a spell that targets Floodspeaker Triton, put a +1/+1 counter on Floodspeaker Triton, then scry 1.

Exile target artifact, enchantment, or creature with flying.

Heroic — Whenever you cast a spell that targets Forge Adept, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
{6}{R}: Create a 3/3 colorless Golem enchantment artifact creature token. If mana from an artifact was spent to activate this ability, that token gains haste.

For each creature you don't control, create a token that's a copy of that creature.
Destroy all creatures.

Fortress Arena enters tapped.
{T}: Add {R} or {W}.
{2}{R}{W}, {T}, Sacrifice Fortress Arena: Draw a card.

When Frost Walker becomes the target of a spell or ability, sacrifice it.

At the beginning of your draw step, draw an additional card. If you control three or more artifacts, draw two additional cards instead.
At the beginning of your end step, discard your hand.

Trample
When Ghastly Progenitor enters, each opponent reveals their hand. Choose two nonland cards revealed this way. Their owners discard those cards.

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.)
[Lore I-II] Put a +1/+1 counter on up to one other target creature you control.
[Lore III] Target creature must be blocked this turn if able.

Trample
{3}, Discard Gilded Ram: Draw a card, gain 2 life, and create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Destroy target non-Gorgon creature. Scry 1.

Augmented — Whenever you cast a spell, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, you may activate one of Glitch's loyalty abilities.
[+1]: You gain 3 life and draw a card, then you may put a land card from your hand onto the battlefield tapped.
[–3]: Exile target nonland permanent. Glitch gains its activated and triggered abilities.
[–6]: Choose a number. Each player sacrifices that many nonland, non-Glitch permanents.

When Glowspore Grove enters or leaves the battlefield, create a 1/1 blue Elemental creature token with flying.

When Gluttonous Empath enters, gain control of target nonland permanent for as long as you control Gluttonous Empath.

Target player discards two cards. Then exile that player's graveyard.

When Goldengrain Alseid enters, you may search your library for a basic Plains card, reveal it, put it into your hand, then shuffle.

Each creature you control that's enchanted or is an enchantment gets +1/+1.
{2}{W}{W}: You may reveal an enchantment card you own from outside the game and put it into your hand.

Flying
Whenever Granter of Weariness enters or attacks, you may tap target creature if its power is less than or equal to the number of Elementals you control.

Target creature gets -4/-4 until end of turn.

Menace
Augmented — When Gravitational Ripper enters, 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.

Whenever a creature dies, put a +1/+1 counter on Grim Armory.
Whenever a creature you control enters, you may move a +1/+1 counter from Grim Armory onto it.

When Grim Procession enters, create two 2/2 black Zombie creature tokens.
{2}{B}: Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Creatures you control get +1/+1.
{5}{W}: Create a 1/1 white Soldier creature token. Activate only as a sorcery.

Permanent spells you cast cost {1} less to cast.
{3}{G}: Choose a counter on target permanent you control, then put another counter of that kind on that permanent or remove that counter from it. Activate only as a sorcery.