Creatures don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player may choose any number of tapped nongreen creatures they control and pay for each creature chosen this way. If the player does, untap those creatures.

Flying, lifelink
Whenever you draw a card, this creature gets +1/+0 until end of turn.
Whenever this creature attacks, draw a card.
Discard a card: This creature gains hexproof until end of turn. Tap it.

Target player mills three cards.
Flashback

At the beginning of each player's upkeep, that player mills X cards, where X is the number of cards in their hand.

Flash
Flying
This creature can block only creatures with flying.
When this creature enters, if you control another Pirate, tap up to two target nonland permanents.

Whenever you cast a Spirit or Arcane spell, you may sacrifice this creature. If you do, draw a card.

Reach
When this creature enters, tap up to one target creature and put three stun counters on it. If you control that creature, draw two cards.

Lifelink
: Adapt 1.
Whenever one or more +1/+1 counters are put on this creature, it gains menace until end of turn.

At the beginning of each upkeep, if this creature is enchanted, create a 1/1 green Saproling creature token.

This land enters tapped unless you control two or more other lands.
: Add or .

Choose one —
• Tap target permanent.
• Untap target permanent.
Entwine

Surveil 1, then draw a card.
Flashback

Target opponent reveals their hand. You choose an artifact or creature card from it, then choose an artifact or creature card from their graveyard. Exile the chosen cards.

: Return target white or black creature card from your graveyard to the battlefield. That creature gains "Cumulative upkeep ." If the creature would leave the battlefield, exile it instead of putting it anywhere else.

, , Discard a card, Sacrifice a land: Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

Flying
At the beginning of combat on your turn, choose up to one —
• Tap target creature.
• Target creature doesn't untap during its controller's next untap step.

At the beginning of your end step, you may pay and sacrifice a nonland permanent. If you do, reveal cards from the top of your library until you reveal a nonland permanent card. Put that card onto the battlefield and the rest on the bottom of your library in a random order.

Flying
Whenever you cast a spell during an opponent's turn, you may have target creature get -1/-1 until end of turn.

Whenever you cast your first spell during each opponent's turn, this creature deals 1 damage to any target.

Menace
Whenever this creature deals combat damage to a player, that player discards that many cards.
Eternalize

Menace
When Dreamstealer deals combat damage to a player, that player discards that many cards.

: Add .
, , Sacrifice this artifact: Draw three cards.

Mutate
Flying
Whenever this creature mutates, draw a card.

Whenever equipped creature deals combat damage to a player, look at the top card of their library, then exile it face down. For as long as it remains exiled, you may play it, and mana of any type can be spent to cast that spell.
Equip

Vanishing 2
Whenever a player casts their second spell each turn, proliferate.

This creature can't attack unless defending player controls an Island.
, Sacrifice an Island: Target land becomes an Island until end of turn.

Sacrifice a creature or land.
Draw a card.

Each opponent chooses a creature card in their graveyard. Put those cards onto the battlefield under your control.