msem-instigator

Destroy target nonland permanent if its mana value is less than or equal to the number of colors among spells you've cast this turn.

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

{T}: Add one mana of any color. If you control another nonbasic land, Abandoned Monument doesn't untap at the beginning of your next untap step.

({T}: Add {G} or {U}.)
Lush Oasis enters tapped unless you control a basic Forest or a basic Island.

({T}: Add {U} or {R}.)
Whenever Crystal Cavern becomes tapped, you lose 1 life unless you control two or more basic lands.

{T}: Add {C}.
{3}, {T}: Aetherize target permanent you control. Activate only as a sorcery. (To aetherize, create a token that's a copy of it, then exile that token.)

Flying, vigilance
Prevent all damage Merciful Yuroda would deal to creatures.

When Sights Beyond enters, scry 3.
Concord — At the beginning of your upkeep, if there are four or more card types among permanents you control, draw a card.

When Damned Deal enters, you draw a card and you lose 1 life.
{B}, Sacrifice Damned Deal: You draw a card and you lose 1 life.

Flying, haste
Whenever Emissary of Antiquity deals combat damage to a player, you may cast an instant or sorcery spell with mana value 3 or less from your hand without paying its mana cost.

Each creature gets -X/-X until end of turn. Destroy each artifact and enchantment with mana value X or less.

Perish Song enters with three time counters on it.
At the beginning of your upkeep, remove a time counter from Perish Song. Then if it has no time counters on it, sacrifice it and destroy all creatures.

Flash
Flying
Whenever you cast a spell during an opponent's turn, target permanent doesn't untap during its controller's next untap step.

Return all creature cards from your graveyard to the battlefield, then exile all but one of them.

When Marauding Goliath becomes blocked by a creature with power 1 or less, sacrifice it at end of combat.

Vigilance, trample
When Threshold Guardian enters, return a creature you control to its owner's hand.

[+1]: Add {R} or {G}.
[–1]: Fatresya deals 2 damage to target creature. That creature can't block this turn.
[–5]: You get an emblem with “Creatures you control get +2/+2 and have haste and trample.”

You may play cards exiled with Azamir planeswalkers.
[+2]: Search each player's library for a card and exile it. Shuffle each library searched this way.
[–3]: Each opponent chooses a permanent they control for each permanent type, then exiles those permanents.
[–8]: Exile all cards your opponents own from outside the game. Until end of turn, you may cast spells without paying their mana costs and you may play cards exiled with Azamir planeswalkers.

[+1]: Haide Bankbuster deals 2 damage divided as you choose among one or two targets.
[+1]: Draw two cards unless any player has Haide Bankbuster deal 3 damage to them.
[–9]: Until end of turn, gain control of all permanents target player controls and they gain haste. Untap those permanents.

[+1]: Untap target land.
[–1]: Exile the top card of your library. You may play that card until end of turn. If a land card is exiled this way, you gain 2 life.
[–7]: Untap each land you control. Lands you control become 3/3 Elemental creatures with haste until end of turn. They're still lands.

[+1]: Scry 1, then draw a card. You lose 1 life.
[–2]: Target player sacrifices a creature, then loses life equal to the greatest power among creatures they control.
[–5]: Choose a nonland card name. Exile all creatures and planeswalkers with that name, then search target player's graveyard, hand, and library for any number of cards with that name and exile them. That player shuffles.

[+1]: Exile up to two target cards from graveyards. You gain 3 life.
[–2]: Exile target artifact, enchantment, or nonbasic land.
[–7]: You get an emblem with “At the beginning of your upkeep, exile target noncreature permanent.”

[+1]: Mill two cards. Create a 1/1 green Spirit Snake creature token.
[0]: You may sacrifice a Spirit. When you do, return target permanent card from your graveyard to your hand.
[–2]: Exile another target nonland permanent until Rain Zai leaves the battlefield. You gain 2 life.

At the beginning of your end step, choose any number of permanents and/or players, then give each another counter of each kind it already has.
[+1]: Scry 1. Add {U} or {R}.
[–X]: Exile the top X cards of your library. Until end of turn, you may play a card exiled with Trainee Karina Oblay.

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
Flashback {3}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)