msem-instigator

Target creature gets +1/+1 until end of turn for each creature token you control.
Put the bottom card of your library into your hand.

(Add a quest counter as this enters. Sacrifice after 3.)
At the beginning of your end step, if you cast two or more spells this turn, add a quest counter.
1, 2 — The Symphony of Leafdown deals 2 damage to any target. Draw a card.
3 — Until the end of your next turn, instant and sorcery spells you cast cost {1} less to cast.

[+1]: Look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.
[–2]: Return target card from your graveyard to the battlefield face down.
[–6]: Turn any number of face-up nonland permanents of your choice face down.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Flash
Flying
When Sharuum, Archmagocrat enters, return to the battlefield all nonlegendary artifact cards in your graveyard that were put there from the battlefield this turn.

Whenever you cast a spell, put a charge counter on Astral Dynamo.
{T}, Remove any number of charge counters from Astral Dynamo: Add that much {C}.

Spells your opponents cast this turn cost {1} more to cast. (Then exile this card. You may cast the creature later from exile.)

{2}{B}{B}, Exile Reclusive Augur from your graveyard: Return another target creature card from your graveyard to the battlefield. Activate only during your turn.

Harvest (You may tap any number of creatures you control as you cast this spell. If you do, reduce this spell's mana cost by their total power.)
Target creature you control deals damage equal to its power to target creature you don't control.

At the beginning of each upkeep, if an opponent controls more creatures than you, create a 1/1 colorless Thopter artifact creature token with flying.

Non-Actor creatures can't block this turn.

Whenever you cast a spell during an opponent's turn, put a charge counter on Gift of the Sphinx.
At the beginning of your upkeep, draw a card for each charge counter on Gift of the Sphinx.

{2}{G}, {T}: Another target creature you control gets +2/+2 until end of turn.

Target opponent chooses up to one creature. Destroy the rest.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Whenever Happy Manta deals combat damage to a player, draw a card for each card type among spells you've cast this turn.

Valdez's Strike Leader can't be blocked if you have more cards in hand than defending player.

Creature tokens you control get +1/+1.
{3}{W}: Create a 1/1 white Warrior creature token.

Menace
Whenever Searing Sandwurm is dealt damage, it deals that much damage to target player or planeswalker.

At the beginning of each opponent's upkeep, choose one —
• At the beginning of the next end step, if you haven't been dealt combat damage this turn, Lord Dalehorn the Iron-Handed deals 3 damage to that player.
• At the beginning of the next end step, if that player hasn't cast a creature spell this turn, Lord Dalehorn the Iron-Handed deals 3 damage to that player.

Menace
Whenever you cast a cryptic spell, you may return target creature card from your graveyard to your hand. (Artifacts, enchantments and modal spells are cryptic.)

Return target creature or land card from your graveyard to your hand.

Flash
When Blade of Mautakesh enters, creatures you control gain poisonous 1 until end of turn. (Whenever those creatures deal combat damage to a player, that player gets a poison counter. Multiple instances of poisonous trigger separately.)

You may look at the top card of your library any time.
Once during each of your turns, you may play a land from the top of your library as though you could play an additional land.
{3}{G}{G}: You may cast the top card of your library without paying its mana cost if it's a creature card. Activate only as a sorcery.

[+1]: Add {W}{U}{B}{R}{G}.
[–1]: Exile the top three cards of your library. Until end of turn, you may play cards exiled with this permanent.
[–3]: Create a 5/5 Archon creature token that's all colors and has flying and “When this creature enters, it deals 5 damage to any target.”

Explosion Fanatic can't attack unless an opponent was dealt damage this turn.