msem-instigator

Deathtouch
Each opponent's maximum hand size is reduced by the number of poison counters that player has.

When Weeping Yaoguai enters, create a 1/1 colorless Spirit creature token.
Scavenge {3}{B} ({3}{B}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

[+1]: Until your next turn, when up to one target creature dies, return a creature card with lesser mana value from your graveyard to the battlefield tapped.
[–1]: Target player discards a card. When they do, return a card with equal mana value from your graveyard to your hand.
[–2]: You may sacrifice a creature. When you do, exile target nonland permanent.

[0]: Create a 2/2 green Panda Bear Monk creature token with “When this creature dies, put a loyalty counter on a Ji planeswalker you control.”
[–2]: Each player sacrifices a nonland permanent. You may return a nonland permanent card from your graveyard to your hand.
[–6]: You get an emblem with “Whenever a permanent you control dies, you may search your library for a card that shares a card type with that permanent and put it onto the battlefield, then shuffle.”

Choose any number —
• Each player loses X life.
• Each player discards X cards.
• Each player sacrifices X creatures.
• Each player sacrifices X lands.

Flying, deathtouch
{2}{B}{B}, Exile Weku, Malignity Spirit from your graveyard with four pact counters on him: You draw four cards and you gain 4 life.
At the beginning of your upkeep, if Weku is exiled with a pact counter on him, remove a pact counter from him. Then if Weku has no pact counters on him, you lose the game.

Advance {5}{B}{B} (Cast this for {5}{B}{B} to advance it as it enters. {5}{B}{B}: Advance this as a sorcery.)
Whenever Well-Oiled Sniper advances, target creature gets -3/-3 until end of turn.

This spell can't be countered.
If a spell or ability an opponent controls causes you to sacrifice Wellspring of Creation, you may put it on the top or bottom of its owner's library instead of putting it into that player's graveyard.

At the beginning of your upkeep, you may pay {G}. If you do, you may put a +1/+1 counter on target creature you control and you gain 2 life.

Destroy target creature.
You gain 2 life.

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.

Augmented — If you've spent {W}{U}{B}{R}{G} to cast spells this turn, you may cast this spell without paying its mana cost.
Counter target spell.

You gain 5 life and draw a card. Then if you've cast spells named When the Stars Align five times this game, you win the game.
Augmented — If you've spent {W}{U}{B}{R}{G} to cast spells this turn, you may shuffle When the Stars Align into your library.

Add {W}{U}{B}{R}{G}. Spend this mana only to cast spells from your graveyard or activate abilities of cards in your graveyard.

Whim of Ifram deals 4 damage to target creature chosen at random.

Discard your hand, shuffle your library, then draw three cards. You may cast a nonland card from your hand without paying its mana cost.
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)

Flash
Whenever Whimsical Dancer enters or is exerted, target creature gets +1/+0 and gains first strike until end of turn.
You may exert Whimsical Dancer as it attacks. (An exerted creature won't untap during your next untap step.)

Flying, prowess
{U}{R}, Exile an instant or sorcery card from your graveyard: Whimsical Elemental gets +1/+1 until end of turn.

Whenever you draw a card, target player mills two cards.
Whenever you cast a blue spell, scry 1, then you may reveal the top card of your library. If it's an instant or sorcery card, draw a card.

Enchant creature
Enchanted creature can't attack or block.
{2}{U}: Return Whiplash and enchanted creature to their owners' hands.

Draw two cards, then discard two cards if it's a combat step.
Quickdraw {U} (When a creature you control blocks or becomes blocked, you may cast this spell for {U}.)

Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Return each nonland permanent your opponents control to its owner's hand.

Flash
Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)

Whenever two or more creatures you control deal combat damage to a player, you lose 1 life and draw a card.

When Whisper Witch enters, choose up to one target creature. That creature's controller mills four cards, then puts that creature on top of their library.