msem-instigator

{T}: Add {C}. If Soaring Observatory entered the battlefield this turn, add one mana of any color instead.
Tap three differently named untapped Academies you control: Add three mana in any combination of colors.

When Somnambulance 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 casts a spell named Fatigue, you may draw a card. If you do, you lose 1 life.

Haste
When Speaker of the Iris enters the battlefield, abound. (To abound, you may cast a spell that costs less than this from your hand without paying its mana cost.)
Other creatures you control have haste.

When Specialized Training Dummy enters the battlefield, choose a card name.
Other creatures you control with the chosen name get +1/+1.

Rouse 4. Sacrifice a creature at the beginning of the next end step. (Distribute four +1/+1 counters among permanents you control. If they aren't creatures, tap them and they become 0/0 creatures in addition to their other types.)

Flash
Flying
When Spectrum Archmage enters the battlefield, return target spell to its owner's hand, then abound. (To abound, you may cast a spell that costs less than this from your hand without paying its mana cost.)

When Speed Reader enters the battlefield, harmonize. (Trigger up to one harmony of a permanent you control.)
Harmony — Add {R}{R}.

When Spellslinger's Gauntlet enters the battlefield, exile an instant or sorcery card with mana value 3 or less from your hand.
Whenever equipped creature attacks, you may copy the exiled card. If you do, you may cast the copy without paying its mana cost.
Equip {3}

Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)
Remove a +1/+1 counter from Spellsword Elite: The next noncreature spell you cast this turn costs {1} less to cast.

Defender, flying
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)
Remove a +1/+1 counter from Spellwork Bulwark: It loses defender and gains hexproof and indestructible until end of turn.

Draw a card. Scry 2.
Orchestrate {U} (You may exile this card from your hand anytime you could cast a sorcery for its orchestrate cost. When you next resolve a spell, you may cast this from exile without paying its mana cost.)

Return target spell to its owner's hand. Its controller can't cast spells this turn. (Spells cast before this resolves are unaffected.)

Whenever Starfall Instructor attacks, harmonize. (Trigger up to one harmony of a permanent you control.)
Harmony — Each opponent loses 2 life.

{T}: Add {C}.
{T}, Pay 1 life: Add {G}.
{G}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Pay 1 life: Add {B}.
{B}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Pay 1 life: Add {W}.
{W}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Pay 1 life: Add {U}.
{U}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Pay 1 life: Add {R}.
{R}, {T}: Add one mana of any color.

Each player chooses up to half the creatures they control, then sacrifices the rest.

Choose one or three —
• Target opponent loses 3 life.
• Return target creature card with mana value 3 or less from your graveyard to the battlefield.
• 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.”)

Stormsurge deals 3 damage to any target.
Orchestrate {R} (You may exile this card from your hand anytime you could cast a sorcery for its orchestrate cost. When you next resolve a spell, you may cast this from exile without paying its mana cost.)

When Strayseeker Ranger enters the battlefield, search your library for a creature card with mana value 2 or less, reveal it, put it into your hand, then shuffle.
Recite {W}{W} (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 Strict Instructor attacks, harmonize. (Trigger up to one harmony of a permanent you control.)
Harmony — Tap or untap another target permanent.

If you've lost life this turn, you may cast this spell as though it had flash.
Return X target cards with different mana values from your graveyard to your hand. Put Studies Past on the bottom of its owner's library.

Whenever Study Sphere or another artifact or enchantment enters the battlefield under your control, rouse 1. (Put a +1/+1 counter on a permanent you control. If it isn't a creature, tap it and it becomes a 0/0 creature in addition to its other types.)