msem-instigator

Choose one —
• Counter target creature or planeswalker spell.
• Return target creature or planeswalker to its owner's hand.

When Dream Keeper enters the battlefield, each player conjures a card named Fatigue and puts it on top of their library. (It's a colorless sorcery that costs {2} with “Draw a card.”)
Whenever a player draws a card except the first one they draw in each of their draw steps, each opponent mills a card.

Haste
Whenever Eager Guide attacks, tap up to two target creatures you don't control.

When Earthcraft Meditation enters the battlefield, put three +1/+1 counters on each land you control.
At the beginning of combat on each player's turn, you may have any number of lands you control become 0/0 creatures with haste in addition to their other types until end of turn.

Each player discards their hand and sacrifices all permanents they control, draws seven cards, then abounds seven times. (To abound, you may cast a spell that costs less than this from your hand without paying its mana cost.)

Whenever a player casts a spell, exile the top card of that player's library. You may play that card for as long as it remains exiled, and you may spend mana as though it was mana of any type to cast it.
At the beginning of your end step, put all cards exiled with Endless Inspiration into their owner's graveyards.

Archive 3 (As this enters, shuffle the top three cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever you draw a card from the archived library, put the top card of your main library on the bottom of the archived library.
{B}: Exchange a card from the archived library with a card from your hand.

Any number of target players mill twice X cards, where X is the number of artifacts and enchantments you control. Then you may cast a nonland card with mana value X or less from a graveyard without paying its mana cost. You can't cast more spells this turn.

Choose one —
• Prevent all damage that would be dealt by creatures this turn.
• Harmonize twice. (Trigger up to one harmony of a permanent you control.)

Haste
{W}, {T}: Tap target creature.

Flash
Creatures other than Equilibrium Paladin that entered the battlefield this turn lose all abilities and have base power and toughness 1/1.

Choose two or four —
• Search your library for a card, put it into your hand, then shuffle.
• Each player mills seven cards.
• You gain 1 life for each land card in your graveyard.
• Conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

This spell costs {1} less to cast for each other card in your hand.
If you have fewer than seven cards in hand, draw cards equal to the difference.

Put target spell on top of its owner's library.
Each player conjures a card named Fatigue and puts it on top of their library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

If a player would draw one or more cards, instead that player draws that many cards plus one and loses 1 life.

Whenever you cast a spell, put a lore counter on Exhilarating Prescience.
At the beginning of your upkeep, exile the top X cards of your library, where X is the number of lore counters on Exhilarating Prescience. You may play those cards until your next turn.

When Expensive Tutor enters the battlefield, tap target land. It doesn't untap during its controller's next untap step.

When Extracurricular Studies enters the battlefield, search target opponent's library for a card and exile it. Then that player shuffles.
You may play cards exiled by Extracurricular Studies and you may spend mana as though it was mana of any type to cast them. When you do, return Extracurricular Studies to its owner's hand.

This spell costs {2} less to cast if your life total is less than or equal to half your starting life total.
Destroy all creatures.

Other creatures get -1/-1.
Recite {1}{B} (You may cast this creature from your graveyard for its recite cost. If you do, exile it when it enters the battlefield or if it would leave the battlefield.)

Whenever Fallacy's Channeler becomes untapped, each player sacrifices a creature.
{T}, Pay 1 life: Fallacy's Channeler deals 1 damage to any target.

Flash
When Fallacy's Sanctifier enters the battlefield, exile up to three target cards from graveyards.
Recite {2} (You may cast this creature from your graveyard for its recite cost. If you do, exile it when it enters the battlefield or if it would leave the battlefield.)

Put target permanent card from a graveyard onto the battlefield under your control.

{1}, {T}: Exile the top two cards of your library, then put a card exiled with Fate Charm on top of its owner's library.

At the beginning of your upkeep, for each of your libraries, look at the top card of that library, then put it on the top or bottom of that library.
{2}, Pay 2 life: Draw a card.