msem-instigator

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]: 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.

Vanishing 4 (This permanent enters the battlefield with four time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever a time counter is removed from Worship in Vain, discard your hand, then draw a card for each time counter on Worship in Vain.

When Worship of the Sun enters the battlefield, draw a card, then choose a card name.
At the beginning of your upkeep, you may tap three untapped creatures you control. If you do, search your library for an enchantment card with the chosen name, put it onto the battlefield, then shuffle.

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.

When Writhing Gateway enters the battlefield, you may discard a card. If you do, create a 5/3 black Horror creature token.
{1}{B}{B}, Discard a card: Create a 5/3 black Horror creature token.

(As this Discovery enters and after your draw step, add a progress counter. Stop after you've discovered.)
I, II — Draw a card.
Discovery — Noncreature spells you cast cost {1} less to cast.

Whenever another enchantment enters the battlefield under your control, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

You may look at the top card of your library at any time.
Whenever one or more creatures attack you, you may pay {1}{U}. When you do, draw a card.

When Wu, the Shackled enters the battlefield, you may have an opponent gain control of it. If you do, draw two cards.
At the beginning of your upkeep, if you don't own Wu, she fights another target creature you control and its owner draws a card.

Trample
Whenever Wun Su, Guru of the Staff deals combat to a player, you may create Wun Su's Staff, a legendary colorless Equipment artifact token with “Equipped creature gets +5/+5” and equip {5}, then attach it to Wun Su.

Vigilance, trample
Pay 3 life: You choose if and how target creature attacks or blocks this turn. You choose before its controller declares other attackers or blockers. Activate only once each turn.

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.

Landfall — Whenever a land enters the battlefield under your control, create a 5/5 green Wurm creature token with trample.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever two or more creatures you control deal combat damage to a player, add a quest counter.
1, 2 — Create a 2/1 black and red Cat Pirate creature token with menace.
3 — Create a colorless artifact token named Motherlode with “{T}: Add two mana of any one color” and “{3}, {T}, Discard your hand: Draw two cards.”
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Whenever you activate a loyalty ability of Xanigan, the Darkened Cloud, you get an emblem with exalted.
[+2]: Xanigan deals 2 damage to up to one target and you gain 2 life.
[–3]: You draw three cards and you lose 3 life.
[–7]: Xanigan becomes a 7/7 Demon creature with flying and indestructible that's still a planeswalker. Prevent all combat damage that would be dealt to her.

Flying
{2}: Copy target activated or triggered ability you control. You may choose new targets for the copy.
{W}{U}{B}{R}{G}: Search your library for a card, exile it, then shuffle. Until the end of your next turn, you may play that card.

[+2]: Tap target permanent. It doesn't untap during its controller's next untap step.
[–3]: Xenocrata, Reality Breaker deals 3 damage to each creature and each other planeswalker.
[–10]: Draw seven cards. You get an emblem with “Whenever you cast an instant or sorcery spell, untap all permanents you control.”

Whenever you cast an instant or sorcery spell, put a loyalty counter on Xenocrata and tap up to one target permanent.
[0]: Each opponent can't untap more than three permanents during their next untap step.
[–3]: Xenocrata deals 6 damage divided as you choose among any number of target creatures and/or planeswalkers.
[–9]: Cast any number of instant and/or sorcery cards you own in exile and from your graveyard without paying their mana costs.

(Choose only one work as a sorcery to add its ability.)
When Xie'e Amphitheatre enters the battlefield, search your library for a card and exile it face down, then shuffle. You may cast that card on any turn you sacrificed a permanent.
{B}: Intro: Together
At the beginning of your upkeep, you lose 1 life and create a 0/1 black Cultist creature token with “{1}{B}{B}, Sacrifice three Cultists: Create a 5/5 black Demon creature token.”
{2}{B}: Finale: Alone
Whenever a Demon enters the battlefield under your control, each opponent loses life equal to its power and you gain that much life.

Trample, vigilance
Spells your opponents cast that target Xiejuan and Hao Lu cost {X} more to cast, where X is the number of other creatures you control.
Whenever another creature you control dies, draw a card.

Alpha (You may have this creature enter the battlefield with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
When Xiejuan, the Regal Beast becomes alpha, draw a card for each other creature you control.

(Transcend as a sorcery to gain that type and a +1/+1 counter.)
When Xifang Hu enters the battlefield, noncreature spells cost {2} more to cast until your next turn.
{1}{W}: Demigod
Whenever a creature attacks this turn, create a 1/1 colorless Spirit creature token.
{4}{W}{W}: God
Distribute a flying, first strike, indestructible, lifelink, vigilance, and +1/+1 counter among any number of creatures you control.

Flying
Whenever a player spends one or more mana to activate an ability that isn't a mana ability, Xihuo deals 2 damage to each opponent.
{B}{R}, Pay 2 life: Xihuo gains double strike until end of turn. Activate only once each turn.

(Transcend as a sorcery to gain that type and a +1/+1 counter.)
Trample
{2}{R}: Demigod
Create a 2/1 black Spirit creature token with “This creature can't block.”
{5}{R}: God
Until end of turn, creatures you control get +1/+0 and gain haste and “When this creature dies, it deals 1 damage to any target.”