msem-instigator

When Vivid Hallucination blocks or becomes blocked, return it to its owner's hand.

{5}, {T}, Sacrifice Voidlife Orbs: Destroy all nonland permanents. You can't spend more than one color of mana to activate this ability.

Flying
Once each turn, when a creature an opponent controls dies, you may create a Treasure token.
{3}{B/R}{B/R}: Search target opponent's library for a card and exile it face down. Then that player shuffles. You may look at and play that card for as long as it remains exiled. Activate only once each turn and only as a sorcery.

Exile target nonland permanent. Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

At the beginning of your end step, draw two cards and you lose 2 life.

Whenever a creature in Water Sutra Daoshi's pack dies, return a creature card with lesser mana value than that creature from your graveyard to your hand. (Two or more creatures you control with equal power are in a pack.)

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

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.

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.

Wild Peak enters the battlefield tapped unless you have 15 or less life.
{T}: Add {R} or {G}.

Wildrune Thicket enters the battlefield tapped unless you have two or more opponents.
{T}: Add {R} or {G}.

Flying
When Witch of Spring's Promise enters the battlefield, shuffle any number of cards from your hand into your library, then draw that many cards plus one.

When Woodcutter's Hatchet enters the battlefield, search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Equipped creature gets +2/+2.
Equip {2}

[+2]: Create a 3/3 red Panda creature token.
[–X]: Sacrifice a creature. If you do, search your library for a creature card with mana value less than or equal to X plus the sacrificed creature's mana value. Put that card onto the battlefield, then shuffle.
[–6]: You get an emblem with “Whenever a creature dies, this emblem deals damage equal to that creature's power to any target and you draw that many cards.”

Equipped creature gets +2/+2 and has poisonous 2. (Whenever this creature deals combat damage to a player, that player gets two poison counters.)
Whenever equipped creature attacks, create a 1/1 green Snake creature token with poisonous 1 that's tapped and attacking. Exile that token at end of combat.
Equip {2}

Flash
When Zhedina Coastguard enters the battlefield, you may have any number of creatures you control have base power and toughness 1/3, 2/2, or 3/1 until end of turn.

When Zhedina Provisioner enters the battlefield, creatures you control get +1/+1 until end of turn. You gain 2 life.