Chase Inspiration

Target creature you control gets +0/+3 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

Island

Rocket Volley

Maelstrom Artisan

Haste
This creature enters prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Maelstrom Artisan // Rocket Volley

Striking Palette

When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.

Pigment Wrangler

Flying
This creature enters prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Pigment Wrangler // Striking Palette

Wisdom of Ages

Return all instant and sorcery cards from your graveyard to your hand. You have no maximum hand size for the rest of the game.
Exile Wisdom of Ages.

Spectacle Summit

This land enters tapped.
{T}: Add {U} or {R}.
{2}{U}{R}, {T}: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Rearing Embermare

Potioner's Trove

{T}: Add one mana of any color.
{T}: You gain 2 life. Activate only if you've cast an instant or sorcery spell this turn.

Mountain

Brush Off

This spell costs {1}{U} less to cast if it targets an instant or sorcery spell.
Counter target spell.

Run Behind

This spell costs {1} less to cast if it targets an attacking creature.
Target creature's owner puts it on their choice of the top or bottom of their library.

Wild Idea

Search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle.

Sanar, Unfinished Genius

Sanar enters prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)
{T}: Create a Treasure token. Activate only if you've cast an instant or sorcery spell this turn.

Sanar, Unfinished Genius // Wild Idea

Tackle Artist

Trample
Opus — Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature. If five or more mana was spent to cast that spell, put two +1/+1 counters on this creature instead.

Thunderdrum Soloist

Reach
Opus — Whenever you cast an instant or sorcery spell, this creature deals 1 damage to each opponent. If five or more mana was spent to cast that spell, this creature deals 3 damage to each opponent instead.

Seize the Spoils

As an additional cost to cast this spell, discard a card.
Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Prismari Charm

Choose one —
• Surveil 2, then draw a card.
• Prismari Charm deals 1 damage to each of one or two targets.
• Return target nonland permanent to its owner's hand.

Deluge Virtuoso

When this creature enters, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Opus — Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn. If five or more mana was spent to cast that spell, this creature gets +2/+2 until end of turn instead.

Terramorphic Expanse

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Artistic Process

Choose one —
• Artistic Process deals 6 damage to target creature.
• Artistic Process deals 2 damage to each creature you don't control.
• Create a 3/3 blue and red Elemental creature token with flying. It gains haste until end of turn.

Elemental Mascot

Flying, vigilance
Opus — Whenever you cast an instant or sorcery spell, this creature gets +1/+0 until end of turn. If five or more mana was spent to cast that spell, exile the top card of your library. You may play that card until the end of your next turn.

Essence Scatter

Stadium Tidalmage

Whenever this creature enters or attacks, you may draw a card. If you do, discard a card.

Spectacular Skywhale

Flying
Opus — Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn. If five or more mana was spent to cast that spell, put three +1/+1 counters on this creature instead.

Zaffai and the Tempests

Once during each of your turns, you may cast an instant or sorcery spell from your hand without paying its mana cost.

Divergent Equation

Return up to X target instant and/or sorcery cards from your graveyard to your hand.
Exile Divergent Equation.