msem-instigator

{1}{R}, {T}, Sacrifice a land: Create a colorless Desert land token with “{T}: Add {C}.”
{1}{R}, {T}, Sacrifice a Desert: Destroy up to two target lands.

When Zareen, the Second Shah enters the battlefield, search your library for a creature card with mana value 2 or less or a planeswalker card, reveal it, put it into your hand, then shuffle.
Monument {2}{W}{W} (You may cast this transformed from your graveyard for its monument cost. Exile it if it would leave the battlefield or not resolve.)

Flying
Whenever you attack with three or more creatures, exile the top card of your library. You may play that card until you exile another card with Zarthane, Scourge of Galdurheim.
{2}{B/R}: Target creature gets +1/+0 and gains menace until end of turn. Activate only as a sorcery.

Lifelink
Spells your opponents cast cost an additional {1} to cast for each spell they've cast before it this turn.

[+1]: Each player discards a card at random, then draws a card.
[–2]: Until end of turn, gain control of target nonland permanent and it gains haste. Untap it.
[–6]: You get an emblem with “Whenever a source you control deals damage to an opponent, gain control of target permanent that player controls.”

Equipped creature gets +1/+1 and has flying.
Equip {2}

{T}, Sacrifice an artifact or enchantment: Draw a card.

Defender
Wanderlust — As long as you control four or more differently named lands, Zhedina Servitor can attack as though it didn't have defender.

Lifelink
When Zhehan, the Mediator enters the battlefield, you may put an Aura card with mana value 3 or less from your hand onto the battlefield attached to a creature it could enchant.

Archive 3 (As this enters the battlefield, shuffle the top three cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
{T}: Add {C}.
{1}, {T}: Scry 1.

Menace
Ferocious — Whenever Zhenya, the Draconic becomes blocked by a creature, it deals 3 damage to that creature if you control a creature with power 4 or greater.

(Transcend as a sorcery to gain that type and a +1/+1 counter.)
Menace
{2}{B}: Demigod — Surveil 2. Each opponent loses 2 life and you gain 2 life.
{4}{B}: God
Search your library for two cards with different names and reveal them. An opponent chooses one. Put the chosen card into your graveyard and the rest into your hand. Then shuffle.

(Transcend as a sorcery to gain that type and a +1/+1 counter.)
You may play an additional land on each of your turns.
{1}{R}{G}: Demigod
Whenever a land enters the battlefield under your control this turn, it deals 3 damage to up to one target creature or planeswalker.
{6}{R}{G}: God
Until end of turn, lands you control become 3/3 Spirit creatures with indestructible and haste that are still lands. Untap them.

Flying
When Zhu Long enters the battlefield, if {W}{U}{B}{R}{G} was spent to cast it, untap up to five target lands.
Once during each of your turns, when you cast an instant or sorcery spell, if no more than one mana of each color was spent to cast it, you may copy it. You may choose new targets for the copy.

Flying, ward {2}
Whenever you cast a noncreature spell, choose up to one target creature. If that spell's mana value is greater than that creature's power, put +1/+1 counters on it equal to the difference.

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
{2}{R}{G}{W}: You may put a creature card from your hand onto the battlefield. It gains haste and vigilance until end of turn. At the beginning of the next end step, return it to your hand unless you're in a renaissance.

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.”
[–2]: Return up to one other target nonland permanent to its owner's hand. Draw a card.

When Zoetic Tomb enters the battlefield, exile target creature.
{4}: Until end of turn, Zoetic Tomb becomes a Golem artifact creature with power and toughness equal to the exiled creature's base power and toughness.

Flying
Whenever one or more creatures you control deal combat damage to a player, exile the top card of that player's library. Until end of turn, you may play cards exiled with Zorganis, Dread Specter and you may spend mana as though it were mana of any type to cast those spells.

[+1]: Each opponent discards a card. If a land card is discarded this way, create a 1/1 colorless Spirit creature token with flying.
[–2]: Until end of turn, creatures you control get +1/+1 and creatures your opponents control get -1/-1.
[–6]: Each opponent chooses up to one permanent they control of each permanent type, then sacrifices the rest.

Enchantment spells you cast cost {1} less to cast.
Enchantment creatures and enchanted creatures you control get +1/+1.

Zygos, Underworld Scourge's power and toughness are each equal to the number of cards you own in exile and in your graveyard.
Spells you cast have “As an additional cost to cast this spell, you may exile any number of cards from your graveyard. This spell costs {1} less to cast for each card exiled this way.”