msem-instigator

Deception {2}{U} ({2}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Marilye deals combat damage to a player, you may search your library for an artifact card with mana value less than or equal to that amount of damage, put it onto the battlefield, then shuffle.

Create two 1/1 white Soldier creature tokens.

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.

{4}, {T}: Look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you don't put the card onto the battlefield, put it into your hand.

When this artifact enters, exile up to one target card from a graveyard.
{2}, {T}, Sacrifice this artifact: Exile up to one target card from a graveyard. Target player creates a tapped 2/2 black Zombie creature token.

At the beginning of each player's upkeep, Noble's Hedonism deals 1 damage to that player, then that player exiles the top card of their library. Until end of turn, they may play that card.

When Sea Hunter enters, you may return target creature with mana value 4 or greater to its owner's hand.

Whenever equipped creature attacks, put a progress counter on Astrina, Tempered by Glory.
Equip {1}
[PROGRESS 1-2] Equipped creature gets +1/+1 and has first strike.
[PROGRESS 3+] Equipped creature gets +4/+4 and has first strike and lifelink.

When Seafloor Casket enters and when you sacrifice it, target player mills two cards.
{1}{U}, Sacrifice Seafloor Casket: Draw a card.
Cycling {2} ({2}, Discard this card: Draw a card.)

Put a +1/+1 counter on each creature you control that entered this turn. (Then exile this card. You may cast the creature later from exile.)

Choose three. You may choose the same mode more than once.
• Each opponent sacrifices a creature.
• Each opponent loses 2 life and you gain 2 life.
• Choose a player and look at their hand. Choose a nonland card from among them. They discard it.

This spell can't be countered.
Hexproof

As an additional cost to cast this spell, exile two cards from your graveyard with the same mana value.
Search your library for a card with the same mana value as the exiled cards, reveal it, put it into your hand, then shuffle.

Ashthread Alley enters tapped.
{T}: Add {B} or {R}.
{B}{R}, {T}, Sacrifice Ashthread Alley: Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)

When Umbersteed dies, target creature an opponent controls gets -4/-4 until end of turn.
Foreshadow {5}{B}{B} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

Legacy (You may play this side of this card only from your graveyard. Exile it if it would be put into a graveyard or not resolve.)
Shuffle any number of target cards in graveyards into their owners' libraries.
Scry 2, then you gain 3 life.

Enchant creature
Enchanted creature gets +1/+1 and has “At the beginning of each end step, you gain 1 life.”

Double strike
Ride {2}{W} ({2}{W}: Transform this and attach it to target creature you control without a Steed. Ride only as a sorcery.)

At the beginning of your upkeep, you lose 1 life.

Enchant player
If enchanted player would shuffle their library, instead that player chooses a permanent they control and a card from their hand, shuffles them into their owner's libraries, then loses 3 life.

Invigorate 1 three times. (Choose a creature with the least power among creatures you control and put a +1/+1 counter on it.)

Whenever a land you control enters, if you haven't had a land become a copy this way this turn, you may have that land enter as a copy of any nonland permanent on the battlefield.

Trample
Art of war — At the beginning of your end step, if Dragon's Wake dealt damage to an opponent this turn, gain control of target land for as long as Dragon's Wake remains on the battlefield.
Tap three untapped creatures you control: Dragon's Wake becomes an artifact creature until end of turn.

({T}: Add {G} or {W}.)
Sungrace Meadows enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)