msem-instigator

Mortalcoil Hydra enters with a number of +1/+1 counters on it equal to the amount of mana spent to cast it.
When Mortalcoil Hydra dies, each opponent loses 3 life and you gain 3 life.
Foreshadow {4}{B}{G} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

Flying
Dragon spells and Adventure spells you cast cost {1} less to cast.

[+1]: Creatures you control get +0/+1 until your next upkeep. Untap those creatures.
[–2]: Put target tapped creature into its owner's library third from the top.
[–7]: You get an emblem with “Whenever a nonland permanent you control is put into a graveyard from the battlefield, each opponent sacrifices a nonland permanent.”

Foretell {2}{W}{W} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Choose one. If this spell was foretold, you may choose both instead —
• Put a +1/+1 counter on each creature you control.
• Exile target nonland permanent an opponent controls. Its controller may scry 2.

Flying
Civilized — Whenever Edifice Overseer attacks, if you control an artifact, a creature, and an enchantment, other attacking creatures you control gain flying until end of turn.

Foretell {2}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Put target nonland permanent on top of its owner's library.
Scry 2.

Target creature you control fights another target creature.
Each player draws a card.

(Add a quest counter as this enters. Sacrifice after 5.)
Whenever you cast a spell, add a quest counter.
1 — Discard a card. If you do, draw a card.
2, 3, 4 — Target opponent discards a card, then draws a card. If they discarded a card with greater mana value than each spell you control, remove a quest counter from Gambler's Tournament.
5 — Discard your hand, then draw seven cards.

When Pyremage's Knack enters or leaves the battlefield, it deals 2 damage to any target.

Menace
Whenever a creature you control deals combat damage to a permanent, that permanent's controller sacrifices it.

Whenever an artifact or enchantment you control enters, target player mills two cards.

This spell costs {1} less to cast for each Angel and/or Nephilim you control.
Draw X cards.

Haste
Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)

Each opponent sacrifices a creature or planeswalker. If you own a foretold card in exile, you gain 4 life.

Destroy up to one target creature with flying or enchantment. Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

({T}: Add {R}.)
Wanderlust — Otherworldly Mountain enters tapped unless you control four or more other differently named lands.
{1}, {T}: Add one mana of any color.

Flying
Ward—Pay 4 life.
Augmented — At the beginning of each end step, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, return HO-20 Rising Sun from your graveyard to the battlefield tapped.

{B}: Revenant Shade gets +1/+1 until end of turn.

{1}{G}, Sacrifice Caustic Caterpillar: Destroy target artifact or enchantment.

Whenever an opponent is dealt damage by one or more sources you control for the second time each turn, draw a card.

As Isochron Wand enters, you may exile an instant or sorcery card with mana value 1 from your hand.
At the beginning of your upkeep, you may copy the exiled card. If you do, you may cast the copy without paying its mana cost if the spell's mana value is 1.

When Defiler of Farmsteads enters, each opponent loses 2 life and you gain 2 life.

When Spirit of the Falls enters, choose a permanent type. Return all other permanents of the chosen type to their owner's hands.
Discard two land cards: Spirit of the Falls gains hexproof until end of turn.

When Captured Mind dies, create a 3/3 white Construct enchantment creature token.

Flying, haste
Whenever Rhyolithic Hellkite attacks, you may sacrifice a land or exile a land card from your graveyard. If you do, put a +1/+1 counter on Rhyolithic Hellkite.