msem-instigator

Return Portal to the Unknown to its owner's hand: Add {U}{U}{U}. The next card you cast this turn can be cast as though it had flash.

When Postmortem Contemplation enters, draw a card.
{1}{U}: Draw a card, then discard a card.

Scry 2, then draw two cards. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Conjure a card named Ancestral Recall, a card named Time Walk, and a card named Timetwister into your main library, then shuffle.
Draw three cards. Exile Power Control.

Spells cost {3} more to cast this turn.
Activated abilities that aren't mana abilities cost {3} more to activate this turn.

Vanishing 5 (This permanent enters with five time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Players play with the top card of their libraries revealed.
Whenever a time counter is removed from Precarious Ledgers, you may have target player mill a card.

Creatures can't attack you unless their controller pays {2} for each of those creatures.
Mirage {1}{U} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Enchant creature
You choose whether enchanted creature attacks each combat rather than its controller (after its controller chooses which of their other creatures attack. That player still chooses the player or planeswalker it attacks.)

Scry 3.
Catalyze. (The next spell you cast this turn costs {1} less to cast.)

At the beginning of each end step, if you've cast a noncreature spell this turn, amass Soldiers 1. (Put a +1/+1 counter on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)

Enchant creature
Enchanted creature gets +0/+1 and has hexproof.
Mirage {U} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Counter target spell unless its controller pays {1} for each card in their graveyard.

Draw two cards, then discard two cards. Then if you cast Price of Wisdom from your graveyard, create a 3/3 blue Sphinx creature token with flying.
Flashback {4}{U}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Cast this spell only before combat.
At end of combat this turn, return all creatures that attacked or blocked this combat to their owners' hands. If no creatures attacked or blocked this combat, draw two cards.

Scry 1. Draw a card. Scry 1.

Kicker {2} (You may pay an additional {2} as you cast this spell.)
Counter target spell if its mana value is 2 or less. If this spell was kicked, counter that spell if its mana value is 4 or less instead.

Enchant creature
When Prophet's Paranoia enters, tap enchanted creature, then scry 2.
Enchanted creature loses all abilities and doesn't untap during its controller's untap step.

When Propulsion Pack enters, create a 1/1 colorless Servo artifact creature token and attach Propulsion Pack to it.
Equipped creature gets +1/+1 and has flying.
Equip {3}{U}

Counter target spell unless its controller pays {2}.
Put a +1/+1 counter on a creature you control.

Scry 1, then draw a card.
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)

You may tap or untap target permanent.
Scry 1.

Enchant creature
{U}: Tap enchanted creature.
{1}{U}: Untap enchanted creature and gain control of it until end of turn.

At the beginning of your end step, you get a perfection counter. Create a token that's a copy of up to one other target creature you control, then exile that token unless you have six or more perfection counters.

Counter target creature spell. Audition for blue. (Create a 1/1 Construct Actor creature token, a Wizard Role giving 2/2 and prowess, or a Warlock Role giving 2/1 and flying. Roles replace older ones.)

Look at the top six cards of your library. Put one of them into your hand and the rest into your graveyard.