msem-instigator

At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
{2}{U}{U}, Sacrifice Search for a New Land: Draw two cards.

Draw three cards. Then discard two cards unless you discard a land card.

Prowess
{1}: Shifting Dweller gets +1/-1 until end of turn.

Flash
Flying
When Strange Sights dies, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Investigate ten times. (Create ten colorless Clue artifact tokens with “{2}, Sacrifice this artifact: Draw a card.”)

Kicker—Sacrifice an artifact. (You may sacrifice an artifact in addition to any other costs as you cast this spell.)
Target creature's owner puts it on the top or bottom of their library. If this spell was kicked, draw a card.

Until end of turn, target creature loses all abilities and has base power and toughness 1/1. If it's attacking, counter all triggered abilities from that source.

Whenever you cast your second spell each turn, create a 1/1 blue Jellyfish Spirit creature token with flying.

Defender
Whenever one or more creatures you control deal combat damage to a player, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
When Wall of Notes dies, draw a card.

When Warping Relic enters or is put into a graveyard from the battlefield, choose one —
• Draw two cards, then discard a card.
• Return another target nonland permanent to its owner's hand.
• Choose any number of target creatures. Switch their power and toughness until end of turn.

Whenever an artifact you control enters or is put into a graveyard from the battlefield, Workshop Engineer gets +1/+1 until end of turn.

When Asking Imp enters, an opponent may pay 2 life. If they do, return Asking Imp to its owner's hand.

Flying, deathtouch

Flying
When Battlefront Scavenger enters, return target creature card with mana value 3 or less from your graveyard to your hand.

{T}, Exert Bestower of Princely Sin: You may sacrifice another creature. If you do, target opponent may sacrifice a permanent that shares a card type with it. If they don't, that player loses 1 life and you draw a card. Repeat this process for artifact, enchantment, land, and planeswalker. Activate only as a sorcery.

Each player sacrifices a creature. Then return a creature card with mana value 3 or less from your graveyard to the battlefield.

This spell costs {1} less to cast for each card type among cards in your graveyard.
Deathtouch

Each creature can't have power greater than its base power and can't have toughness greater than its base toughness.

When Decrepit Hero dies, create a 2/2 black Soldier creature token.
Fleeting {1}{B} (You may cast this spell for its fleeting cost. If you do, sacrifice it at the beginning of the next end step.)

Whenever Desperate Thief deals combat damage to a player, you may pay 2 life. If you do, draw a card.

Haste
Fleeting {B} (You may cast this spell for its fleeting cost. If you do, sacrifice it at the beginning of the next end step.)

Whenever a creature you control dies, put a loyalty counter on Dias, Freed from Belief.
[0]: Create a 2/1 black Nightmare creature token with “This creature can't block.”
[–X]: Destroy target creature or planeswalker unless an opponent pays twice X life.

Choose one or both —
• Destroy target creature with mana value 1 or less.
• Each player discards a card.

Enchant creature
Enchanted creature gets -3/-3.

Ward—Sacrifice three permanents.
At the beginning of your end step, put a desperation counter on End of History. Draw two cards for each counter on it, then exile the top three cards of your library for each counter on it.