Flash

Whenever an opponent puts one or more counters on a creature they control, they put the same number and kind of counters on Bold Plagiarist.

Destroy target creature with total power and toughness 5 or less.

Target creature gets -1/-1 until end of turn for each Swamp you control.

Whenever another creature you control dies, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Whenever you sacrifice a token, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Move all counters from target creature onto another target creature.

Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."

Destroy target creature or planeswalker.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Destroy target creature or planeswalker. Each creature that convoked Lethal Scheme connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.)

Partner with Ley Weaver (When this creature enters the battlefield, target player may put Ley Weaver into their hand from their library, then shuffle.)

{5}{U}{U}: Target player draws two cards.

Morbid -- When you cast this spell, if a creature died this turn, you may copy Malicious Affliction and may choose a new target for the copy.

Destroy target nonblack creature.

Destroy target creature.

Flash

If an opponent would draw a card except the first one they draw in each of their draw steps, instead that player skips that draw and you draw a card.

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Counter target spell. Untap up to four lands.

Choose two target players. Each of them searches their library for a card, then shuffles and puts that card on top.

Whenever an opponent casts a creature spell, Soul Barrier deals 2 damage to that player unless they pay {2}.

Each opponent sacrifices a creature or planeswalker with the highest mana value among creatures and planeswalkers they control.

Partner with Pir, Imaginative Rascal (When this creature enters the battlefield, target player may put Pir into their hand from their library, then shuffle.)

Whenever you draw a card, put a +1/+1 counter on Toothy, Imaginary Friend.

When Toothy leaves the battlefield, draw a card for each +1/+1 counter on it.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

Partner with Gorm the Great (When this creature enters the battlefield, target player may put Gorm into their hand from their library, then shuffle.)

Deathtouch

Whenever Virtus the Veiled deals combat damage to a player, that player loses half their life, rounded up.

For each player, choose friend or foe. Each friend returns a creature card from their graveyard to their hand. Each foe sacrifices a creature they control.

Equipped creature can't be blocked and has shroud. (It can't be the target of spells or abilities.)

Equip {2}