msem-instigator

Flash
When Notorious Smuggler enters, target opponent reveals their hand. Choose a nonland card revealed this way. Copy it. You may cast the copy this turn. (You still pay its costs, including color. Copies of permanents enter as tokens.)

Vanishing 5
The High Prairies enters tapped.
{T}: Add one mana of any color.

Flash
When Remnant Spotter enters, put target permanent card from your graveyard on top of your library.

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.

Lifelink
{2}{B}: Target Spirit gets +1/+0 and gains lifelink until end of turn.

Menace
Crew 2 (Tap any number of creatures you control with total power 2 or greater: This Vehicle becomes an artifact creature until end of turn.)

When Chimera Graft dies, manifest the bottom card of your library. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Weathered Fortress enters tapped.
{T}: Add {U} or {R}.
{U}{R}: Until end of turn, Weathered Fortress becomes a 1/4 blue and red Golem creature with with “When this creature attacks, switch its power and toughness until end of turn” and “Whenever this creature attacks or blocks, torment yourself.” It's still a land. (To torment yourself, lose 3 life unless you discard a card or sacrifice a nonland permanent.)

Deathtouch
Sacrifice a creature: Target player mills two cards.

As an additional cost to cast Acid Sewage, reappropriate or pay {3}. (To reappropriate, exile exactly two cards from your hand and/or graveyard.)
Destroy target creature.

Prowess
Whenever you cast a noncreature spell, you may mill two cards.

Flying
Chosen one ({W}{U}{B}{R}{G}: Transform this permanent.)

Whenever you cast an instant, sorcery, or Wizard spell, Slipsand Runemage deals 1 damage to any target.

Flying
When Graceful Yuroda enters, return target permanent you control to its owner's hand.

This spell can't be countered.
Enchant land
At the beginning of combat on your turn, untap enchanted land. It becomes a 6/6 green Lizard creature with haste until end of turn. It's still a land.

Flying, vigilance

Precursor Sanctum enters tapped. When it does, look at the top three cards of your library, exile one face down, then put the rest on the bottom of your library in any order.
{T}: Add {C}.
{4}, {T}: You may play the exiled card without paying its mana cost. Activate only as a sorcery.

Flying
Kai'Wej, the Desolate has indestructible as long as you control no other creatures.
{1}{B}{B}, Sacrifice two creatures: Return Kai'Wej from your graveyard to the battlefield tapped.

Reach
When Ambush Predator enters, you may return target Horror creature card from your graveyard to your hand.
When Ambush Predator dies, exile it and create a 3/2 green Horror creature token.

When Frontier Savior enters, return up to two target creature cards with mana value 3 or less from your graveyard to the battlefield.

When Mire Sculptor enters, mill three cards.
Whenever you sacrifice a permanent, you may pay {2}. If you do, return target permanent card from your graveyard to your hand.

Vigilance
Concord — {G}: Hero of the Stained Blade gets +2/+2 and gains trample until end of turn. Activate only if there are four or more card types among permanents you control and only once each turn.

Flash
Flying
When Living Antimagic enters, counter target spell unless its controller pays {2}.
Spells that target Living Antimagic cost {2} more to cast.

When Fables of the Bold enters, draw a card.
Enchanted creatures you control get +1/+1.

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
At the beginning of your end step, Substack Sniper deals 1 damage to you and to each cursed opponent.