Whenever you cast an instant or sorcery spell, create a 2/2 black Zombie creature token with decayed.
At the beginning of your upkeep, if you control three or more creature tokens, you may transform this creature.

Draw three cards, untap up to two lands, then discard a card.

Whenever this creature becomes blocked, you may look at defending player's hand.

Flash
When this creature enters during the declare attackers step, you may reselect which player or permanent target attacking creature is attacking. (It can't attack its controller or their permanents.)

, : Return target creature you control and each Aura attached to it to their owners' hands. Activate only during your turn.

Look at the top three cards of target player's library, then put them back in any order. You may have that player shuffle.
Draw a card at the beginning of the next turn's upkeep.

Flying
Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1, is black, and has ", : Destroy target blue creature."

When this Vehicle enters, gain control of target creature an opponent controls for as long as you control this Vehicle. That creature can't attack or block for as long as you control this Vehicle.
Crew 3

Mutate
Flash
Whenever this creature mutates, you may return target creature an opponent controls to its owner's hand.

Enchant artifact
Enchanted artifact's activated abilities cost less to activate. This effect can't reduce the mana in that cost to less than one mana.

Enchant enchantment
At the beginning of the upkeep of enchanted enchantment's controller, that player may pay any amount of mana. This Aura deals 2 damage to that player. Prevent X of that damage, where X is the amount of mana that player paid this way.

Choose target creature an opponent controls, then roll a d20.
1-9 | Return it to its owner's hand.
10-19 | Its owner puts it on their choice of the top or bottom of their library.
20 | Gain control of it until the end of your next turn.

At the beginning of each player's upkeep, that player exchanges control of random target artifact, creature or land he or she controls, for control of random target permanent of the same type that a random opponent controls.

Enchant enchantment
At the beginning of the upkeep of enchanted enchantment's controller, that player loses 2 life unless they pay .
Cycling

Counter target white or black spell.

At the beginning of your upkeep, you may look at the top card of target opponent's library. If you do, you may put that card on the bottom of that player's library.

You may look at the top card of your library any time.
You may cast instant and sorcery spells from the top of your library.
: Exile the top card of your library.

Draw three cards.
Addendum — If you cast this spell during your main phase, instead scry 3, then draw three cards.

Choose a card name, then target player mills a card. If a card with the chosen name was milled this way, you draw two cards. Otherwise, you draw a card.

Counter target creature spell.

Flying
When this creature enters, create a 1/1 blue and red Elemental creature token.

Scry 2, then draw a card.

When this artifact enters, conjure a card named Ponder into your hand.
Whenever one or more Merfolk you control deal combat damage to a player, sacrifice this artifact. If you do, conjure a card named Flooded Strand into your hand.

Flying
Whenever you cast an instant or sorcery spell, scry 1.

Exchange your library with another deck you own from outside the game. Shuffle.

Tap target creature. It doesn't untap during its controller's next untap step.
Investigate.

Return target spell or nonland permanent an opponent controls to its owner's hand. You may cast an instant or sorcery spell with equal or lesser mana value from your hand without paying its mana cost.

Flying
Cycling

At the beginning of your end step, you may manifest the top card of your library.
Exile a face-down permanent you control face up: You may play that card this turn. (You still pay its costs. Timing rules still apply.)

When Princess Yue dies, if she was a nonland creature, return this card to the battlefield tapped under your control. She's a land named Moon. She gains ": Add ." (She's still legendary.)
: Scry 2.