You may look at the top card of your library any time.
Approval — Once during each of your turns, you may cast a spell with mana value less than or equal to the number of colors among permanents you control from your hand or the top of your library without paying its mana cost.

Flash
When this creature enters, cache up to one other target permanent you control.

The owner of up to one target nonland permanent puts it on the top or bottom of their library. Return each other nonland permanent to its owner's hand.

Flash
When Grasping Ancient enters, exile up to one target instant or sorcery spell.
Whenever Grasping Ancient attacks, you may cast the exiled card without paying its mana cost.
Spellcharge 4

Surveil 1, then draw a card. Exile Harbor Mail with a stamp counter on it.
When you cast a spell for its surface cost, if Harbor Mail is exiled with a stamp counter, you may pay {U} and put it into your graveyard. If you do, surveil 1, then draw a card.

Flying
Whenever you draw your second card each turn, put a +1/+1 counter on Haubay's Familiar.

Defender
When Herald of Awakening enters, draw a card. Then discard a card unless you control a Ruin.
Whenever a Ruin you control becomes spellcharged, Herald of Awakening loses defender until end of turn.

Flying
When Herald of Drizzles enters, it acclimates.

At the beginning of your end step, if you cast no spells this turn, surveil 1.
Spellcharge 6

Ward {3}
Whenever Horror of the Mystic Sea attacks, defending player mills two cards. If they milled two nonland cards this way, Horror of the Mystic Sea can't be blocked this turn.

Amity — This spell costs {1} less to cast if you attacked with exactly two creatures this turn.
Draw two cards.

Scry 1. Draw a card, then discard a card.
Flashback {U}

Draw two cards, then discard a card. You may cast a spell with mana value 3 or less from your hand without paying its mana cost.

Vigilance
When Informed Voter enters, make a pledge.

When Invader of Privacy enters, surveil 1, then draw a card.

Put a defender counter on each creature.

Whenever this Subroutine runs, exile up to one other target creature or Subroutine. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Flying
Discard a card: Put a +1/+1 counter on Jetstream Cruiser. Activate only once each turn.

When this creature enters, cache the top card of your library face down.
Activated abilities of Memories you control cost {1} less to activate.

When Kappa Colony enters, create three 1/1 green Plant creature tokens.
Whenever you cast a spell from your graveyard, put a +1/+1 counter on each Plant you control.

King of Currents can't attack unless there are six or more cards in your graveyard.
Surface {4}{U}{U}

Flying
Whenever one or more creatures you control become tapped, tap up to one target creature an opponent controls.

Enchant creature
When Left to the Sea enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Defender
As long as you control another tapped creature, this creature can attack as though it didn't have defender.