msem-instigator

[+1]: Augur. (Look at the top card of your library. You may sacrifice a creature to put it into your hand. Otherwise, put it back or put it into your graveyard.)
[–X]: Exile target card in your graveyard with mana value X. Copy it. You may cast the copy without paying its mana cost.
[–6]: You get an emblem with “Whenever a creature you control dies, search your library for a creature card, reveal it, and put it into your hand, then shuffle.”

Flying, trample
When Whisper in the Rift enters, target player mills half their library, rounded down.
When Whisper in the Rift dies, you may cast up to two instant, sorcery, and/or creature cards from among opponent's graveyards without paying their mana cost.

{1}, {T}, Sacrifice two or more nonland permanents: Return target creature card from your graveyard to the battlefield. If permanents with total mana value 4 or greater were sacrificed this way, draw a card.

Archive 5 (As this enters, shuffle the top five cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Recursive — Xirix's Study has all nonrecursive abilities of all Study cards in graveyards except for their archive abilities.

You may activate loyalty abilities of Xirix, the Usurper during extra turns any time you could cast an instant.
[+1]: Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
[–2]: Destroy each nonland, non-Xirix permanent with the greatest mana value among non-Xirix permanents on the battlefield.
[–6]: Put target permanent card from a graveyard onto the battlefield under your control.

Choose two —
• After the first postcombat main phase this turn, there's an additional combat phase followed by an additional main phase. Creatures you control gain vigilance until end of turn.
• Creatures you control gain indestructible until end of turn.
• Creatures you control gain lifelink until end of turn.
• Creatures you control get +2/+0 until end of turn.

Flying
Whenever Fakadeh, Florid Queen attacks, you may exile an instant or sorcery card from your graveyard with mana value 3 or less.
Whenever Fakadeh deals combat damage to a player, cast any number of cards exiled with her without paying their mana costs.

Take an extra turn after this one. At the beginning of that turn's end step, sacrifice each land you control. Whenever you cast a spell during that turn, copy it. You may choose new targets for the copy.
Exile Futuretheft.

Vigilance
If you would take a combat phase or a main phase, take the other instead.
{U/B}, Pay 1 life: Untap target creature you control.

[+2]: Up to one target creature gets +3/+1 until your next turn. Up to one target creature gets -3/-1 until your next turn.
[–2]: Up to two other target permanents you control become a copy of another target permanent until your next turn.
[–8]: Exchange your library and hand, then shuffle.

Flying
Whenever you cast a noncreature spell, you may exchange control of it and target creature. Then the spell's controller may choose new targets for it.

Choose two —
• Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.
• Each opponent loses life equal to the number of cards you've drawn this turn.
• Rahstahde's Command deals damage to each creature equal to the number of cards you've drawn this turn.
• Create a 1/1 white Soldier creature token for each card you've drawn this turn.

When Tempting Shahmaran enters, gain control of target creature. Untap it and it gains haste. At the beginning of the next end step, exile that creature and put X +1/+1 counters on Tempting Shahmaran, where X is that creature's power.
Tempting Shahmaran has all activated abilities of cards exiled with it.

Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Noncreature spells you cast cost {X} less to cast, where X is All-Encompassing Akvan's power.

At the beginning of each other player's upkeep, draw a card, then discard a card unless you have Am'atambi, Fable Weaver deal 3 damage to you.
You may reveal creature cards as you draw them. Once each turn, when you reveal a creature card this way, you may pay {3}. If you do, create a token that's a copy of it, except it's 3/3.

Choose two —
• Exile target creature with the greatest power among creatures on the battlefield.
• Target player looks at the top four cards of their library. They put one into their hand, then exile the rest.
• Exile up to four target cards from opponents' graveyards.
• Until the end of your next turn, target player may play cards exiled by Andazir's Command.

[+1]: Create a token that's a copy of another target permanent. Exile that token at the beginning of your next upkeep.
[–3]: If it's not an extra turn, you take an extra turn after this one, then skip your next turn that's not an extra turn.
[–6]: Until end of turn, planeswalkers become copies of I, Queen of Eons, except they aren't legendary. Destroy all nonland, non-I permanents.

Choose two —
• Return up to two target nonland permanents to their owner's hands.
• Any number of target players each sacrifice a creature.
• Any number of target players each sacrifice a planeswalker.
• Any number of target players each sacrifice an artifact or enchantment.

Flying
When Sahra's Harbinger enters, reveal the top six cards of an opponent's library and separate them into two piles. That opponent chooses one of those piles and puts it into their hand. You may cast any number of nonland cards in the other pile without paying their mana costs.

Haste
At the beginning of combat on your turn, create two nonlegendary token copies of Thrice-Clawed Troika. Then for each creature token created this way, create token copies of each permanent attached to Thrice-Clawed Troika and attach them to that creature token. Exile all tokens created this way at end of combat.

Gain control of target nonland permanent if you control a permanent with a greater mana value. Otherwise, destroy that permanent.

[+1]: Emperor Tzhai deals 1 damage to each creature, planeswalker, and opponent you don't control.
[0]: Target creature can't attack you or Emperor Tzhai until Emperor Tzhai leaves the battlefield.
[–10]: You control target player.

When Fearless King Shabil enters, reveal the top five cards of your library. You may put a Cat card from among them into your hand. Put the rest on the bottom of your library in any order.
At the beginning of combat on your turn, each Cat you control gains all abilities of each other Cat you control until end of turn.

Flying
If a source you control would deal noncombat damage to a permanent or player, you may have it deal damage equal to Hadak's power instead.

Choose two —
• Target player creates three 1/1 white Soldier creature tokens.
• Destroy target creature if its mana value is equal to or less than the number of creatures you control.
• Target opponent loses 1 life for each creature you control and you gain that much life.
• Put a +1/+1 counter on each creature target player controls.