msem-instigator

Reveal the top X cards of your library, where X is the number of lands you control. Put any number of permanent cards revealed this way onto the battlefield and the rest on the bottom of your library in a random order.

Trial 6 (As you cast this spell, an opponent of your choice may pay 6 life. If they don't, they fail the trial.)
Flying
When Reckoner of Man enters the battlefield, if the trial was failed, it deals 3 damage to each creature you don't control.

Indestructible
When Reflected Worldwalker enters the battlefield, each player puts their hand into their sideboard.

Each player exiles all permanents they control, draws that many cards, then puts up to that many permanent cards from their hand onto the battlefield. Exile Reform Reality.

Choose a creature. Exile the rest.

First strike, lifelink
Tribute 4 (As this creature enters the battlefield, an opponent of your choice may put four +1/+1 counters on it.)
When Righteous Priestess enters the battlefield, if tribute wasn't paid, the chosen player can't cast creature spells during their next two turns.

Gain control of up to two target creatures until end of turn. Untap them. They gain haste until end of turn.
Menagerie — If there are five or more creature types among creatures you control, untap all creatures you control. Until end of turn, they gain “{T}: This creature fights another target creature.”

Ruins Monitor can't be blocked by more than one creature.

Trample
Players can't activate abilities of nonbasic, noncreature permanents.

You have hexproof.
Creatures you don't control have base power and toughness 1/1 and lose all abilities.
Nonbasic lands you don't control don't untap during their controller's untap step.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
Whenever a creature enters the battlefield under your control, you may have it deal damage equal to its power to another target creature or planeswalker.
I, II, III — Exile the top two cards of your library. You may put a creature card from among them onto the battlefield with a +1/+1 counter on it. It gains haste.
IV — Creatures you control get +3/+3 and gain trample until end of turn.

Flying, prowess
Once each turn, when you cast a noncreature spell, you may create a 4/4 blue Sphinx Wizard creature token with flying, then scry 1.
{2}{U}{U}, Discard Sage of the Hereafter: Create a 4/4 blue Sphinx Wizard creature token with flying, then scry 1. Activate only as a sorcery.

Whenever Sanctuary is dealt damage, you gain that much life.
All damage that would be dealt to another creature you control is dealt to Sanctuary instead.

Flash
Satrapies you control have “{T}: Draw a card.”

Flying, haste
Whenever Scourge of the Skies attacks, you may have it deal 5 damage to target creature.

Trample
When Sealer of Pacts enters the battlefield, sacrifice any number of permanents, then draw that many cards.

When Sear, Forged of Lava enters the battlefield, create a 3/3 red Panda creature token, then attach it to that token.
Equipped creature gets +3/+3, has flying, haste, and “Whenever this creature dies, it deals 3 damage to target opponent or planeswalker.”
Equip {2}{R}{R}

Take an extra turn after this one. During that extra turn, you may cast spells you own not named See the World from outside the game by tapping an untapped Scout you control in addition to paying their mana costs.
Exile See the World.

Enchant creature
You control enchanted creature.
When Shahmaran's Captivation enters the battlefield, untap enchanted creature. It gains haste until end of turn.

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.)
When Shaman of the First Pact enters the battlefield, exile up to four target creature cards from graveyards. You may cast them for as long as they remain exiled and you may spend mana as though it were mana of any type to cast them.

When Shardsong Seedling enters the battlefield, conjure two cards named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)

Return each nonland permanent you don't control to its owner's hand.
Coalesce {6}{U}{U}{U} (You may cast this from your graveyard for {6}{U}{U}{U}. 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.)
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Exile all nontoken creatures. For each creature exiled this way, return that card to the battlefield under a random player's control.

Flying, vigilance
When Silksoul Celestial enters the battlefield, search your library for an enchantment or Aurashaper card, reveal it, put it into your hand, then shuffle.
When Silksoul Celestial dies, you may put an enchantment or Aurashaper card from your hand or graveyard onto the battlefield.

If you control seven or more creatures, you may cast Sociable Giant without paying its mana cost.
Trample