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.

Choose two target creatures controlled by the same player. That player sacrifices one of them of their choice.

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.

When The Battle Beneath enters, up to two target creatures can't block or become blocked this turn.
Whenever one or more creatures you control deal damage to an opponent this turn, draw a card.
Whenever one or more creatures you control deal damage to an opponent this turn, that player discards a card.

Enchant creature
Enchanted creature gets +1/+1 for each enchantment you control.

Create two 1/1 white Golem creature tokens.
Landfall — {W}, Exile The Ruins Awaken from your graveyard: Create a 1/1 white Golem creature token. Activate only as a sorcery and only if a land entered the battlefield under your control this turn.

Equipped creature gets +2/+2.
Whenever equipped creature attacks, choose any number —
• Pay {R}. When you do, The Sunfire deals 2 damage to any target.
• Pay {W}. When you do, tap target creature you don't control. You gain life equal to its power.
Equip {2}

Decayed
You may cast The Venerable Veteran from your graveyard.

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.

{1}{R}: Thieving Catspaw dares 3.
Whenever Thieving Catspaw becomes a Rebel, you may discard a card. If you do, draw a card.

{1}, Sacrifice another creature: Put a +1/+1 counter on this creature.

Haste
{1}{R}: Threatening Officer gets +2/+0 until end of turn.

Whenever equipped creature attacks, you may have it dare 7 until end of turn.
Equip {3}

Enchant creature
As long as enchanted creature has flying, each creature you control has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

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.

Experience
When Tidepool Turtle has three or more +1/+1 counters on it, remove them all and transform it.

{2}, Sacrifice an artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put that card onto the battlefield, then shuffle. Activate only once each turn and only as a sorcery.

Ward {2}
Whenever an enchantment you control enters, put a +1/+1 counter on Tiro, the Silent Blade.

{3}, Sacrifice Titanic Fossil: Mill three cards, then you may exile a card from your graveyard. You may cast a copy of the exiled card without paying its mana cost if the spell's mana value is 3 or less. Activate only as a sorcery.
{3}{U}{B}: Return Titanic Fossil from your graveyard to the battlefield transformed. Activate only during your turn.

Equipped creature gets +2/+0 and has protection from permanents and spells with greater mana value than itself. This effect doesn't remove Titansbane.
Equip {2}{W}

Discard a card. If you do, draw two cards and create a Weapon token.

To the Last Breath deals 4 damage to target attacking or blocking creature.

Tap another untapped creature you control: Toki gets +1/+1 until end of turn. If that creature had flying, Toki gains flying until end of turn. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance. Activate only as a sorcery.

You may sacrifice a land. If you do, draw two cards.
Maneuver

When Torch Twirler enters, you may discard a card. If you do, add the top two cards of your library to your evil plan.