msem-instigator

If you would draw a card, you may draw two cards and have each opponent draw a card instead.
Spells cost {1} less to cast if a player cast a spell this turn.

As an additional cost to cast this spell, sacrifice a land.
You may put a land card you own from outside the game onto the battlefield.

{4}, {T}: Look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you don't put the card onto the battlefield, put it into your hand.

Trample
World Tender's power and toughness are each equal to twice the number of differently named lands you control.

Destroy target creature or planeswalker, then exile its controller's graveyard.

Double strike
The first spell you cast during each of your turns costs {W}{U}{B}{R}{G} less to cast. This effect reduces only the amount of colored mana you pay.

At the beginning of your upkeep, if there are three or more colors among permanents you control, you gain 2 life and draw a card.

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.

Whenever a nontoken creature enters the battlefield under your control, you may scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

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.

Each player shuffles their hand and each non-Revelation card from their graveyard into their library, then draws seven cards. You may put any number of land cards from your hand onto the battlefield.
Coalesce {6}{G}{U}{U}

Exile the bottom card of your library, a card from your hand, and a card you own from outside the game. Put them in a face down pile, shuffle that pile, then manifest those cards. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

{T}, Sacrifice Worldshaper Adept: Choose two basic land types. Create a tapped colorless land token of the chosen types.

Whenever equipped creature deals combat damage to a player, destroy all permanents other than Worldslayer.
Equip {5}

Vigilance
Whenever a creature you control survives damage, it 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.)

Whenever one or more creatures you control attack, you may put a progress counter on Worldwide Reach.
[PROGRESS 2+] Whenever you cast a noncreature spell, creatures you control get +1/+1 until end of turn.
[PROGRESS 4+] Whenever you cast a noncreature spell, creatures you control gain lifelink until end of turn.

{2}{W}, Exile Worldwise Ascetic from your graveyard: Create a green Aura enchantment token named Years of Experience attached to target creature. The token has enchant creature and “Enchanted creature gets +2/+2.” Activate only as a sorcery.

Flash
When Wormwood's Agent dies, create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

[+2]: Put a -1/-1 counter on or remove a -1/-1 counter from up to one target creature.
[–1]: Draw a card, then each player sacrifices a nonland permanent.
[–10]: Destroy all nonland permanents you don't control.

Vigilance
When Worn Peacekeeper dies, create a 1/1 white Soldier creature token with vigilance.

Whenever equipped creature attacks, it gets +2/+2 and gains trample until end of turn.
Equip {2}

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

Each opponent sacrifices an artifact.
Scry 1.
Coalesce {6}{R} (You may cast this from your graveyard for its coalesce cost. If you do, put it onto the battlefield as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
When Worried Vulpine has three or more +1/+1 counters on it, remove them all and transform it.