msem-instigator

Changeling (This card is every creature type.)
{T}: Add {C}.

Double strike
Art of war — At the beginning of your end step, if Kogane's Swordmaster dealt damage to an opponent this turn, put a +1/+1 counter on it.

Up to two target creatures each get +X/+X until end of turn. They must be blocked this turn if able.

({T}: Add {W}.)
As Sunlit Meadow enters, you may pay 1 life. If you don't, Sunlit Meadow enters tapped.
Basic lands you control have “{T}: Add {W}.”

Enchant creature
Enchanted creature gets +2/+2 as long as it's an Actor. Otherwise, it gets -2/-2.

When Queue Bouncer enters, return target creature to its owner's hand. If you control another Actor, instead put that creature on top of its owner's library.

Living Broadcast can't block.
Whenever you cast a spell from exile, you may return Living Broadcast from your graveyard to your hand.

Nameless Throng can't block.
{1}{B}, Exile an artifact or enchantment card from your graveyard: Return Nameless Throng from your graveyard to the battlefield.

Put two +1/+1 counters on target creature. (Cast a copy of this spell once while this creature is on the battlefield.)

Ride {2}{W} ({2}{W}: Transform this and attach it to target creature you control without a Steed. Ride only as a sorcery.)

Swarm of Sporemites gets +1/+1 for each creature card and Revelation card in your graveyard.

Menace
Ni'Ama's Emissary gets +1/+1 as long as you control a red or white permanent.

Menace
Evanescent Soulcatcher's power and toughness are each equal to the number of cards in exile.
{2}, Exile a card from your hand: Regenerate Evanescent Soulcatcher.

Enchant creature
Enchanted creature gets +1/+0 and has haste.
Once each turn, when enchanted creature becomes tapped, you may add {R}{R}. Until end of turn, you don't lose this mana as steps and phases end.

As this creature enters, choose a creature type.
This creature is the chosen type in addition to its other types.
Other creatures you control of the chosen type get +1/+0.

Flying, lifelink
Creatures entering or leaving the battlefield don't cause abilities to trigger unless that creature is in a pack. (Two or more creatures a player controls with equal power are in a pack.)

({T}: Add {G} or {U}.)
As Mushroom Lagoon enters, you may pay {1}. If you don't, Mushroom Lagoon enters tapped.

Hexproof
Crossworld Wanderer gets +1/+1 for each differently named land you control.

Vigilance
Bulwark — {1}{W}, {T}: Create a 1/1 white Soldier creature token. Activate only if you control a creature with toughness 4 or greater.

Whenever you discard one or more cards, create a Treasure token and draw a card. This ability triggers only once each turn.
Whenever two or more creatures you control attack, you may discard a card. If you do, target creature can't block this turn.

At the beginning of your upkeep, choose one —
• You lose 1 life.
• You draw two cards and you lose 3 life.
• Search your library for a card, put it into your hand, then shuffle. You lose 5 life.

Whenever you draw a card, put a quest counter on Fallback Plan.
Remove four quest counters from Fallback Plan and sacrifice it: Search your library for a card, put that card into your hand, then shuffle.

When Over the Horizon enters, scry 1.
{T}: Add {C}.
{1}, {T}: Return Over the Horizon to its owner's hand.

Whenever Shina Taiyohata or another creature you control enters, you may have that creature gain haste. If you do, return that creature from the battlefield to its owner's hand at the beginning of the next end step.

As Forgotten Idol enters, choose a card name.
Spells with the chosen name can't be cast.
{2}, Exile a card with the chosen name from your hand: Exile Forgotten Idol, then each player draws a card. Any player may activate this ability.