msem-instigator

Cast this spell only if an opponent controls two or more nonwhite creatures or you control six or more lands.
Create X 1/1 white Bird creature tokens with flying. You gain X life.

Flying
Nonartifact permanents entering the battlefield don't cause abilities to trigger.

Each player sacrifices a creature.

Menace (This creature can't be blocked except by two or more creatures.)
Avatar of Basat can't block.

At the beginning of your upkeep, you may choose a color, then exile two cards of that color from your graveyard. If you do, return a creature, instant, or sorcery card of that color from your graveyard to your hand.

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 (This permanent enters the battlefield with five time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
The High Prairies enters the battlefield 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 the battlefield 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 the battlefield, 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 the battlefield, 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 the battlefield 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 Border Guardian enters the battlefield, 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.