msem-instigator

Vanishing 3 (This permanent enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever a creature dies or a time counter is removed from Mourn the Lost, you may tap target creature.

Reclusive Copse enters tapped.
{T}: Add {B} or {G}.
{1}{B}{G}: Until end of turn, Reclusive Copse becomes an Insect creature with deathtouch in addition to its other types.
Scavenge {B}{G}

Enchant creature
Enchanted creature gets +1/+3.
{W}: Return Conviction to its owner's hand.

Choose one or both —
• Scene to Cinders deals 2 damage to each token creature.
• Scene to Cinders deals 2 damage to each nontoken creature.

Each other colorless creature you control enters with an additional +1/+1 counter on it.

When Aether Sculptor enters, create a tapped colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

You may put a permanent card from your hand onto the battlefield. If it's a planeswalker, it enters with five loyalty counters rather than any other amount, and you may activate its loyalty abilities this turn any time you could cast an instant.

Whenever you cast a spell, for each of that spell's colors, create a 1/1 Scout creature token that's all colors.

When Daybreak enters, you gain 3 life.
Creatures can't attack you or planeswalkers you control unless their controller pays {1} for each of those creatures.

Mill three cards. When you do, return another nonland card from your graveyard to your hand.

Deathtouch
Whenever a creature an opponent owns dies, exile the top two cards of that player's library face down. For as long as those cards remain exiled, you may look at them, you may cast them, and you may spend mana as though it were mana of any type to cast them.

When Bioluminescent Predator dies, draw a card, then you may put a land card from your hand onto the battlefield.

Flash
When Dreamnapper enters, another target creature phases out until Dreamnapper leaves the battlefield. (Treat it and anything attached to it as though they don't exist as long as it's phased out.)

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

First strike

At the beginning of each end step, if you've cast a noncreature spell this turn, Void Sculptor deals 1 damage to each opponent.

{T}: Add one mana of any type that a land you control could produce.
Augmented — At the beginning of your end step, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, untap Thriving Budling and put three +1/+1 counters on it.

Exile target creature or planeswalker with mana value 4 or less.

First strike, menace
When Zhargetan Reclaimer enters, put any number of cards your opponents own from exile into their owners' graveyards. If three or more cards were put into graveyards this way, create two 1/1 Scout creature tokens that are all colors.

When Capac's Envoy enters, draw a card.
If one or more players would draw one or more cards except the first draw of a draw step, instead each player may draw up to the greatest number of cards that would have been drawn this way.

When Doomed Traveler dies, create a 1/1 white Spirit creature token with flying.

{T}: Add {C}.
Wanderlust — {T}: Add one mana of any color. Activate only if you control four or more differently named lands. If you control seven or more, you may add three mana of that color instead.

Aurashaper and Aura spells you cast cost {1} less to cast.

For each color among nontoken permanents you control, add one mana of that color.