msem-instigator

Enchant creature
Whenever enchanted creature deals combat damage to a player, exile the top card of your library. Until end of turn, you may play that card.

{W}: Parish Custodian gains lifelink until end of turn. (Damage dealt by this creature also causes you to gain that much life.)

Flash
Flying
When Bruna, Shepherd of Souls enters, exile target noncreature spell. Then exile its controller's graveyard.

Trample
Whenever Crazed Wildlings deals combat damage to a player, create a 1/1 red Goblin creature token.

{T}: Draw two cards. Starting with the next opponent in turn order, each opponent may discard a land card. The first to do so gains control of Ashen Mare. Activate only during your turn.

Perish Song enters with three time counters on it.
At the beginning of your upkeep, remove a time counter from Perish Song. Then if it has no time counters on it, sacrifice it and destroy all creatures.

Enchant creature
When Til Death enters, exile target creature an opponent controls other than enchanted creature until Til Death leaves the battlefield.
Enchanted creature has defender.

At the beginning of your upkeep, create a 1/1 green Saproling creature token.
Whenever a creature you control dies, put a +1/+1 counter on Heart of Spores.
{X}{G}: Move X +1/+1 counters from Heart of Spores onto target creature. Activate only as a sorcery.

Whenever Kan'Gi, the Reverent perseveres, gain control of target creature an opponent controls with power less than or equal to Kan'Gi's power. (A creature perseveres when it survives damage.)

Reach, trample
Whenever this creature transforms into Flourishing Companion or attacks, untap all lands you control.

Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
If a player casting a noncreature spell would cause an ability of a permanent you control to trigger, that ability triggers an additional time.

Whenever Thundering Towershell attacks, return a creature card with mana value 5 or less from a graveyard to the battlefield under your control. Trigger a death knell of that creature.

Bleed {1}{B} (You may cast this spell for its bleed cost if an opponent lost life this turn.)
Deathtouch
Treacherous Informant enters with two +1/+1 counters on it if you paid its bleed cost.
You may cast spells for their bleed costs if you lost life this turn.

At the beginning of your upkeep, you lose 1 life, then reveal the top card of your library. You lose life equal to its mana value unless it is a creature card. Put that card into your hand.

Target creature gets +2/+0 and gains flying and first strike until end of turn.

Target player reveals a number of cards from their hand equal to the number of creature cards in your graveyard. You choose one of them. That player discards that card.

Target player sacrifices an attacking creature.
Bulwark — That player sacrifices two attacking creatures instead if you control a creature with toughness 4 or greater.

At the beginning of your upkeep, Reality Collapse deals 1 damage to each opponent.
{2}{R}: Until end of turn, whenever an opponent is dealt noncombat damage, Reality Collapse deals that much damage to target creature that player controls.

Exile up to three target creatures you control, then return those cards to the battlefield under your control tapped.

You mill two cards, draw two cards, lose 2 life, and create two Treasure tokens. (They're artifacts with “{T}: Sacrifice this permanent: Add one mana of any color.”)

Changeling (This card is every creature type.)
{T}: Add {C}.

Lost Explorer has first strike as long as it's attacking.
{1}{B}, Exile Lost Explorer from your graveyard: Crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

Sacrifice a creature: Rapacious Demon gets +1/+1 and gains flying until end of turn. Activate only as a sorcery.

Enchant creature
When Deathless Conscription enters, untap enchanted creature.
You control enchanted creature.

Whenever you gain life for the first time each turn, draw a card.
{3}{G}{W}: You gain life equal to the greatest toughness among creatures you control.