msem-instigator

Waterfront Market enters tapped unless you control a basic land.
{T}: Add {W} or {U}.

Each other creature you control that's a Merfolk or an Elemental gets +1/+1.
Whenever you cast an instant, sorcery, or Merfolk spell, you may pay {1}. If you do, create a 1/0 blue Elemental creature token.

Spend only black mana on X.
Up to two target creatures each get -X/-X until end of turn. You gain X life.

Flying, lifelink
At the beginning of each end step, if you gained 3 or more life this turn, choose one —
• Put a +1/+1 counter on Waxing Angel.
• Exile target artifact or enchantment.

Create two Idol tokens, then counter target spell unless its controller pays {1} for each Idol you control. (They're artifacts with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

Counter up to one target spell unless its controller pays {2}. Until end of turn, you may cast spells as though they had flash.

Exile all Inscription cards from your graveyard and all exiled Inscription cards you own. For each card exiled this way, you may inscribe it onto a creature you control. (Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost.)

{T}, Pay 1 life, Sacrifice Wayfarer's Shrine: Search your library for a basic land card, put it onto the battlefield, then shuffle.

Survivors you control have double strike.

At the beginning of your upkeep, each player draws a card.

Target creature gets +2/+2 until end of turn.
Wanderlust — If you control four or more differently named lands, that creature gets +4/+4 until end of turn instead.

As Wayward Wanderers enters, you may have it become X/X with ward {X} and “Other creatures you control have base power and toughness X/X.”
{1}{G}: Return Wayward Wanderers to its owner's hand.

When Weald Sentry enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle.
When Weald Sentry dies, draw a card.

Mill five cards, then return up to one permanent card from your graveyard to your hand.

Until end of turn, target noncreature, non-Equipment artifact becomes an Equipment with equip X and “Equipped creature gets +X/+0”, where X is that artifact's mana value.

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.)

When Weaver of Mists enters, substantiate target card in your graveyard. (Put it onto the battlefield face down as a 2/2 creature. You may turn it face up and cast it at any time for its mana cost if it isn't a creature.)
Spells you cast from anywhere other than your hand cost {1} less to cast.

Vision (Whenever this or another creature you control enters, reveal the top card of your library. Then you may put that card into your graveyard.)
Whenever Weaver of the Winds envisions an instant or sorcery card, draw a card.

At the beginning of your upkeep, discard a card and create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

Weeping Lotus enters with five petal counters on it.
At the beginning of your upkeep, remove a petal counter from Weeping Lotus. If you do, create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

[+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.

Target player discards a card. Until your next turn, whenever that player casts a spell, they discard a card.

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.