msem-instigator

Harmony — Draw a card, then discard a card.
Whenever Dramatic Artist attacks, harmonize. (Trigger up to one harmony of one permanent you control.)

Target creature gets +2/+0 until end of turn and can't be blocked except by three or more creatures this turn.
Flashback {U/R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Exile up to three instant or sorcery cards from your graveyard. You may cast a copy of each card exiled this way without paying its mana cost.

{1}{R}, {T}, Sacrifice an artifact: Elise, Maktali Prodigy deals 2 damage to any target.
{1}{U}, {T}, Sacrifice an artifact: Return target nonland permanent to its owner's hand.
{3}{U}{R}, {T}, Sacrifice three artifacts: Discard your hand, then draw seven cards.

Flash
Prowess
When Ella enters, create two 1/1 blue Wizard creature tokens with prowess.
Whenever you cast a noncreature spell, you may sacrifice a creature. If you do, copy that spell. You may choose new targets for the copy.

Whenever you cast an instant or sorcery spell, exile cards from the top of your library until you exile an instant or sorcery card. You may cast that card until you exile another card with this ability.

When Emerging Ankulim enters, return each non-Elemental creature to its owner's hand, then Emerging Ankulim deals damage to each player equal to the number of cards in that player's hand.

Artifact creatures you control can't be blocked by nonartifact creatures.
{2}{U}{R}: Put a +1/+1 counter on an artifact creature you control or a progress counter on a Project you control.

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.)
Encylopetia's power and toughness are each equal to the number of cards in the archived library.
At the beginning of your upkeep, exile a card from the archived library at random. You may play it this turn.

Choose a card name, then look at the top card of your library. If it has the chosen name, you may exile it and you may play it from exile until end of turn.
Whenever a creature you control becomes tapped, you may return Enigma of Seventy Scrolls from your graveyard to your hand.

Hexproof
At the beginning of your upkeep, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.

Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on Entelan Duelist.
{2}{U}{R}, Remove two +1/+1 counters from Entelan Duelist: Copy target instant or sorcery spell you control. You may choose new targets for the copy.

You may have Enthusiastic Double enter as a copy of any permanent on the battlefield, except it's 4/4, it's a creature in addition to its other types, and it has haste.

Eureka! (At the beginning of each end step, you get a research counter if you cast a spell this turn. Then if you have eight or more research counters, remove them and create a Masterpiece token of your choice.)
At the beginning of your first end step each turn, you get an additional end step after this step.

Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Favoured Firebrand dies, you may pay {U}{R} any number of times. Whenever you do, Favoured Firebrand deals 2 damage to any target and you draw a card.

Flash
When Fiery Truthseeker enters, you may cast target instant or sorcery card with mana value 3 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

Instant and sorcery spells you cast cost {1} less to cast.

When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

[+1]: Create a 1/1 red Dragon creature token with flying.
[–1]: Until end of turn, Flynn becomes a copy of target Dragon, except she has haste and indestructible. Her base power and toughness become equal to the number of Dragons you control.
[–3]: You may reveal a Dragon card you own from outside the game and put it into your hand.

Archive 6 (As this enters, shuffle the top six cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever one or more Dragons you control attack, you may cast the top card of the archived library without paying its mana cost.

Create a 2/2 red Dragon creature token with flying and haste.
Whenever a nontoken Dragon you control attacks, you may return Flynn's Wonder from your graveyard to your hand.

[+1]: Create a 1/1 blue Dragon creature token with flying and “This creature can't attack unless you control a nontoken Dragon.”
[–2]: Flynn deals damage to target creature or planeswalker equal to the total power of Dragons you control.
[–5]: You get an emblem with “Dragon spells you cast cost {U}{R} less to cast and have flash.”

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
{U}{R}, Exile an instant or sorcery card from your graveyard: Foolhardy Huo gains flying and first strike until end of turn.

Choose any target. Change the text of target instant or sorcery spell to “This spell deals 3 damage to the chosen target. Draw a card.”

[+1]: Draw a card, then discard a card.
[–2]: Fulmen, Aether Prodigy deals 2 damage divided as you choose among one or two targets. Draw a card.
[–6]: Whenever you cast an instant or sorcery spell this turn, copy it. You may choose new targets for the copy.