Steamveil Model enters with a +1/+1 counter on it.

Sterling enters under the control of an opponent of your choice.
At the beginning of your upkeep, surveil 1.
Play with the top card of your library revealed.
Your opponents may play lands and cast spells from the top of your library during their turns, and they may spend mana of any type to cast spells this way.

When Stonework Infuser enters, create a 1/1 blue Gargoyle artifact creature token with flying.

Flying
Ward {X}, where X is the number of enchantments you control.
Whenever Stormscraper of Ketaphos deals combat damage to a player or planeswalker, create a token that's a copy of another target enchantment you control.

As an additional cost to cast this spell, put X cards from your hand on the bottom of your library. This spell costs {X} less to cast.
Scry 2, then draw three cards.

Surveil 2, then draw two cards.

Scry 3.
Create a 1/1 colorless Thopter artifact creature token with flying.

Counter target spell unless its controller pays {X}. If they do, create an X/X blue and black Fish creature token.

Target creature gains flying until end of turn. Draw a card.

Flash
When Tempo Arbiter enters, up to one target creature gets -X/-0 until end of turn, where X is the number of artifacts you control.

As long as you've cast an instant spell this turn, Teqien Overseer gets +1/+1 and has hexproof.
As long as you've cast a sorcery spell this turn, Teqien Overseer gets +1/+1 and has flying.

Draw a card. When you do, pay for and choose any number.
+{U} — Return target spell you don't control to its owner's hand. That player draws a card.
+{R} — Target player discards all the cards in their hand, then draws that many cards.
+{G} — Target player may put a land card from their hand or graveyard onto the battlefield.

Target creature gains hexproof until end of turn. Untap it.
Draw a card if your devotion to blue is three or greater.

Flash
Whenever Thassa's Tideshaper attacks, defending player mills two cards and you draw a card. Then discard a card unless defending player has eight or more cards in their graveyard.

[+2]: Each player puts their hand on the bottom of their library in a random order. You draw five cards, then each opponent draws two cards.
[+1]: Untap each land you control.
[–3]: Return up to three target nonland permanents to their owner's hands.
[–9]: You get an emblem with “Whenever an opponent casts their first spell each turn, gain control of it. You may choose new targets for that spell.”

Whenever you cast a noncreature spell, choose one —
• Create a 1/1 white Human creature token.
• Target player mills three cards.
• Scry 2.

Draw two cards.
Return all nonland, nonenchantment permanents to their owners' hands.
You may cast a non-Saga spell with mana value 5 or less from your hand without paying its mana cost.

Tap all permanents.
Exile The World Stood Still.

Draw a card if a creature you control has flying. Do the same for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Draw three cards. Then discard two cards unless you discard a card with flashback.
Flashback {6}{U}{U}

Whenever you cast a creature spell, put X depth counters on Tide's Ire, where X is that spell's mana value.
Remove ten depth counters from Tide's Ire: Create an 8/8 blue Kraken creature token.
Remove thirty depth counters from Tide's Ire: Create Tromokratis, a legendary 20/20 blue Kraken creature token with trample and hexproof.

Tidewake Walker enters with a hexproof counter on it.

When Tireless Aspirants enters, you may draw a card. If you do, discard a card.
Wander {1}{U}

Draw two cards.
Up to one target creature gains flying until end of turn.

Target opponent reveals cards from the top of their library until four land cards are revealed. Exile each card revealed this way. If seven or fewer cards were exiled this way, scry 3.