msem-instigator

When Titan of Lake Vasil enters, untap up to four target permanents.
{3}{U}: Draw a card.

{T}: Add {C}.
{3}, {T}: Create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

As an additional cost to cast this spell, sacrifice a permanent.
Exile target creature.

{T}: Add {C}.
{T}, Exile two cards from your graveyard: Add {G} or {U}.

Enchant creature
Enchanted creature gets +1/+1 and has lifelink.

{1}{U}{B}, Exile a creature card from your graveyard: Vestige of Evil has base power and toughness equal to the exiled creature's power and toughness until end of turn.

Wu Xing (Add effects based on the number of colors of mana spent to cast this spell.)
1 | Return target creature card from your graveyard to the battlefield.
5 | It gains vigilance, trample, lifelink, indestructible, and haste until end of turn.

Take an extra turn after this one. If this spell was cast from exile, take two extra turns after this one instead. Shuffle Reflected Moment into its owner's main library.
Prophecy {6}{U}{U} (Once each turn, you may exile a card with prophecy as you reveal it. When you do, you may cast it for its prophecy cost as long as it's exiled.)

Whenever you cast an instant, sorcery, or Curse spell, Stromkirk Sangromancer deals 1 damage to each opponent.

Menace
Crew 2 (Tap any number of creatures you control with total power 2 or greater: This Vehicle becomes an artifact creature until end of turn.)

When Voltaic Conduit enters, it deals 5 damage to target creature or planeswalker you don't control.
Whenever you attack, you may discard a card. If you do, draw a card.

Vigilance
Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
Whenever Silvercrest Sentry attacks, untap up to one target legendary creature you control.

Menagerie — {1}{G}: Slipsand Hornshell gains indestructible until end of turn. Tap it. Activate only if there are five or more creature types among creatures you control.

Cannoncoil Hermit enters with X +1/+1 counters on it.
{1}, {T}: Put a +1/+1 counter on Cannoncoil Hermit.
{1}, {T}, Remove a +1/+1 counter from Cannoncoil Hermit: It deals damage equal to its power to any target.
{3}: Untap Cannoncoil Hermit.

At the beginning of your upkeep, return target creature card from your graveyard to the battlefield.

Trample
Savage Mammoth gets +1/+1 for each land you control.
Ride {4}{G} ({4}{G}: Transform this and attach it to target creature you control without a Steed. Ride only as a sorcery.)

Prowess
Whenever Steamwalker attacks, you may discard a card. If you do, draw a card, then catalyze. (The next spell you cast this turn costs {1} less to cast.)

Enchant artifact or creature
When Dilapidate enters, tap enchanted permanent.
Enchanted permanent loses all abilities and doesn't untap during its controller's untap step.

Flying
Whenever you cast an instant or sorcery spell, Scourge of the Sun gets +1/+0 until end of turn. If you spent four or more mana to cast that spell, Scourge of the Sun gets an additional +1/+0 until end of turn.

Flying
When Hallowed Executioner enters, it deals 2 damage to each creature without flying.

Haste
Augmented — When Attuned Lifeform enters, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on each creature you control. They gain vigilance until end of turn.

Creatures with power equal to the number of cards in your hand can't attack.

{T}: Add {C}.
{T}, Reappropriate: Add {B} or {G}. (Exile exactly two cards from your hand and/or graveyard.)

Enchant creature
Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Enchanted creature gets +3/+0 and has menace.

Rushing Waters enters tapped.
{T}: Add {U} or {R}.
When Rushing Waters enters, you may put a loyalty counter on a planeswalker you control.