msem-instigator

Equipped creature gets +0/+2.
As long as equipped creature is a Wizard, it has “{T}: Scry 1.”
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

When Trainer of the Abyss dies, create a 1/1 black Demon Hound creature token with deathtouch.

Search your library for a cryptic card, reveal it, put it into your hand, then shuffle. (Artifacts, enchantments, and modal spells are cryptic.)

Whenever a storied permanent you control enters, each opponent discards a card. (Enchantments and legendary permanents are storied.)

Flash
When Crossroads Harrier enters, it deals 2 damage to target opponent or permanent an opponent controls unless that player has you draw a card.

Destroy target artifact or enchantment.
Lifecycle {3} ({3}, Discard this card: Create two tapped 1/1 colorless Elemental creature tokens.)

When Gilded Merrow enters, if an opponent controls more lands than you, create a Treasure token. (It's an artifact with “{T}, Sacrifice this permanent: Add one mana of any color.”)

{T}: Add {C}.
{2}, {T}, Sacrifice Arcor Diamond: Draw a card.

Whenever you cast a spell from your hand, exile the bottom card of your library. You may cast that card. If you don't, Fight or Fade deals 1 damage to each player.

Sacrifice Proud Lion: Counter target spell that targets you.
Ride {1}{W} ({1}{W}: Transform this and attach it to target creature you control without a Steed. Ride only as a sorcery.)

Rapport — Whenever Tinkering Swarm and at least one other creature you control become tapped, create a token that's a copy of Tinkering Swarm.

Defender
Prismatic — Whenever you cast a multicolored spell, Squall Serpent gets +1/+1 until end of turn and can attack this turn as though it didn't have defender.

Flash
Flying
You may cast creature spells with flying as though they had flash.
Whenever another creature with flying you control enters, this creature gets +1/+1 until end of turn.

Whenever an Equipment you control enters, attach it to target creature you control.

When Wharling Willow dies, you may search your library for up to three basic land cards and put them onto the battlefield tapped. If you do, shuffle.

Equipment spells you cast cost {1} less to cast.
Armed — As long as Fellor Armorsmith is equipped, equip abilities you control cost {1} less to activate.

Flying
Artifact spells you cast cost {1} less to cast.

Flash
When Hidden Sprout enters, put a +1/+1 counter on target creature.

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
Discard a card: Abominable Mongrel gets +1/+1 and becomes the color of your choice until end of turn.

Look at the top five cards of your library. You may reveal an enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Poisonous 5 (Whenever this creature deals combat damage to a player, that player gets five poison counters.)
At the beginning of your upkeep, if an opponent is poisoned, you may destroy target Human.

({T}: Add {B} or {R}.)
Urban Wastelands enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

Flash
When Shadow Stalker enters, for each player, look at the top card of that player's library. You may have that player put that card into their graveyard.

{3}, {T}, Sacrifice Punja Stick Trap: Punja Stick Trap deals 2 damage to target creature. Tap it.

When Furnished Ghul dies, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)