msem-instigator

Flash
You may cast spells as though they had flash.

If a permanent you control with mana value 5 or greater entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Whenever you cast a noncreature spell, you may pay {1}. If you do, scry 2. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

When Wizened Calligrapher enters, you may search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top of it.

Whenever you cast a spell, you may pay {1}. If you do, Wizened Tortle explores. (Reveal the top card of your library. Put it into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then you may put that card in your graveyard.)

When Woken Wave dies, you may exile it. If you do, return target card from your graveyard to the battlefield face down.

When Wondering Oaf dies, return target instant or sorcery card from your graveyard to your hand.

If you would draw one or more cards, you may have each player draw an additional card.
Spells cost {1} less to cast if a player cast a spell this turn.

Whenever an artifact you control enters or is put into a graveyard from the battlefield, Workshop Engineer gets +1/+1 until end of turn.

Wu Xing (Add effects based on the number of colors of mana spent to cast this spell.)
1 | Counter target permanent spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.
3 | You gain life equal to its mana value.

Draw two cards.
Memento {5}{U}{U} (You may cast this from your graveyard for {5}{U}{U}. If you do, put it onto the battlefield transformed after it resolves. Exile it if it would leave the battlefield or not resolve.)

Wanderlust — This spell has flash as long as you control four or more differently named lands.
Draw four cards.

{T}: Scry 1.
{1}{U}, {T}: Draw a card.

Enchant creature you control
Enchanted creature gets +1/+1 and has hexproof and “{T}: Target player mills two cards.”
Whenever you play a land, untap enchanted creature.

I, II — Draw a card.
Discovery — Noncreature spells you cast cost {1} less to cast.

Whenever you cast a noncreature spell, you may put a progress counter on Wunderkind Devising.
[progress 1+] At the beginning of your upkeep, reveal the top three cards of your library. Put each artifact card from among them into your hand and the rest into your graveyard.
[progress 4+] Artifacts you control are artifact creatures with base power and toughness 5/5.
Artifacts you control are artifact creatures with base power and toughness 5/5.

Foretell {1}{U}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Counter target spell. If this spell was foretold, draw a card.

Foretell {2}{U}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Choose one. If this spell was foretold, you may choose both instead —
• Draw three cards, then discard two cards.
• The owner of target nonland permanent puts it on the top or bottom of their library.

Flying
Whenever Yawning Crane deals combat damage to an opponent, target tapped creature that player controls doesn't untap during its controller's next untap step.

Enchant creature
When Yenzu Puppeteering enters, draw a card.
{1}{U}: Untap enchanted creature.

When Yron Bay Sentinel enters, draw a card.

Whenever you cast a noncreature spell, look at the top X cards of your library, where X is that spell's mana value. Put those cards on top of your library in any order.

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
[+1]: Create a 2/2 blue Elemental Illusion creature token with flying and “Whenever this becomes the target of a spell, sacrifice it.”
[–3]: Return up to one other target nonland permanent to its owner's hand. Draw a card.

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
Zoulev Envoy can't be blocked.

As an additional cost to cast this spell, sacrifice an artifact.
Draw three cards.