msem-instigator

Destroy target creature. Its controller discards a card.

Vigilance
Blessed Suncrusher's power and toughness are each equal to your life total.

Choose two —
• Target player creates a 1/1 blue Wizard creature token with prowess.
• Target player draws two cards, then discards two cards.
• Tap up to two target creatures.
• Target creature or player gains hexproof until end of turn.

Whenever Fated Mariner attacks, forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)
{1}{U}: Fated Mariner can't be blocked this turn.

{T}: Add {C}{C}. Spend this mana only to cast spells with mana value 5 or greater.

Whenever Green Pelt Hart or another Elk creature you control deals combat damage to a player, draw that many cards.

Scry 2, then reveal the top or bottom card of your library. Creatures you control get +X/+X until end of turn, where X is that card's mana value.
Draw a card.

Haste
Whenever this creature attacks, destroy up to one other target permanent. If you do, its controller reveals cards from the top of their library until two cards that each share a card type with that card are revealed and exiles those cards. That player puts the exiled cards onto the battlefield, then shuffles.

Target opponent may have Desperate Contrition deal 4 damage to them. If that player doesn't, you draw three cards.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

Equipped creature gets +3/+2.
Equip {4}
Hail of Blades's equip ability costs {4} less to activate if it targets an equipped creature.

When Contagious Host dies, each player loses 1 life.
Revive {2}{B} ({2}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

This spell costs {2} less to cast if it targets a creature with an Adventure.
Destroy target creature or planeswalker.

Lifelink
Pay 3 life: Flightful Fledgling gains flying until end of turn.

Flying, deathtouch
{B}: Emissary of Dreaded Night gets +1/+1 until end of turn. Activate only if Emissary of Dreaded Night is embattled. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

As an additional cost to cast Deepmire Abomination, reappropriate or pay {2}. (To reappropriate, exile exactly two cards from your hand and/or graveyard.)
Menace

Trample
{2}{G}{G}: Put Canal Lurker from its owner's graveyard on top of its owner's library.

Whenever an opponent casts a spell, if no mana was spent to cast it or it has mana value greater than the number of lands that player controls, counter that spell.
{G/W}, Sacrifice this creature: Citizens and Peasants you control get +1/+1 and gain indestructible until end of turn.

Whenever a creature you control perseveres this turn, you gain 3 life. (A creature perseveres when it survives damage.)

Prevent all combat damage that would be dealt this turn.
Create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

First strike, haste
Whenever you cast an enchantment, instant, or sorcery spell, put a +1/+1 counter on Plasma Blader.
{2}{R}{R}, Sacrifice Plasma Blader: It deals damage equal to its power to any target.

{T}: Add {C}.
{T}, Tap an untapped artifact, creature, or land you control: Add one mana of any color.
{T}: Choose a card name, then reveal the top card of your library. If that card has the chosen name, you may sacrifice Sealed Archives and draw a card.

Trial 4 (As you cast this spell, an opponent of your choice may pay 4 life. If they don't, they fail the trial.)
Target player sacrifices two noncreature permanents if they failed the trial.

Put a +1/+1 counter on target creature you control. Prevent all damage that would be dealt to that creature this turn.

This spell costs {X} less to cast, where X is half the number of creatures on the battlefield, rounded down.
Destroy all creatures.

Flying
{1}{W}, {T}: Tap target creature.