Scry 1, then draw a card. If you control a Kraken, Leviathan, Octopus, or Serpent, instead scry 3, then draw a card.

Scry 3, then draw three cards.
If this spell's flashback cost was paid, take an extra turn after this one.
Flashback {7}{U}{U}

Draw a card.
Make a pledge, then make a pledge again.

This spell costs {4} less to cast if each of its targets are owned by different players.
Return up to two target nonland permanents to their owners' hands.
Cycling {2}

When Enlightenment enters, draw a card for each color of mana spent to cast it.
You have no maximum hand size.

Exile up to two target artifacts, creatures, or lands you control, then return them to the battlefield under their owner's control. If any of those permanents are Ruins, they become creatures in addition to their other types until end of turn.

Target creature gains hexproof until end of turn. Teach it vigilance.

Draw a card. The next ninjutsu ability you activate this turn costs {1} less to activate.

Draw three cards.
Surface {5}{U}{U}

Whenever this Subroutine runs, create a 2/2 blue Bird enchantment creature token with flying.

Target player mills two cards, then mills two more cards for each card named Fathomless Dominion in your graveyard.

Return target creature to its owner's hand. If you've cast another instant or sorcery spell this turn, draw a card.

Exile target creature you control, then return that card to the battlefield under its owner's control.

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.

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.

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.

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.

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.

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.

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

At the beginning of your end step, scry 1. Then if it's your first turn of the game or you discarded a card named Leystone of Depths this turn, draw a card.
Cycling {U}

Create a 2/2 blue Drake creature token with flying.
Whenever a creature you control enters, if it wandered, you may exile Lofty Frontiers from your graveyard. If you do, create a 2/2 blue Drake creature token with flying.