Ritual of Hope

Creatures you control get +1/+1 until end of turn.
Coven — If you control three or more creatures with different powers, creatures you control get +2/+1 until end of turn instead.

Environmental Sciences

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. You gain 2 life.

Shadewing Laureate

Flying
Whenever another creature you control with flying dies, put a +1/+1 counter on target creature you control.

Vampire Interloper

Battlefield Raptor

Beaming Defiance

Target creature you control gets +2/+2 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

Thunderous Orator

Vigilance
Whenever Thunderous Orator attacks, it gains flying until end of turn if you control a creature with flying. The same is true for first strike, double strike, deathtouch, indestructible, lifelink, menace, and trample.

Combat Professor

Flying
At the beginning of combat on your turn, target creature you control gets +1/+0 and gains vigilance until end of turn.

Killian, Ink Duelist

Lifelink
Menace (This creature can't be blocked except by two or more creatures.)
Spells you cast that target a creature cost {2} less to cast.

Kaya's Onslaught

Target creature gets +1/+1 and gains double strike until end of turn.
Foretell {W} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Introduction to Annihilation

Exile target nonland permanent. Its controller draws a card.

Inkling Summoning

Create a 2/1 white and black Inkling creature token with flying.

Silverquill Apprentice

Magecraft — Whenever you cast or copy an instant or sorcery spell, target creature gets +1/+0 until end of turn.

Stalwart Valkyrie

You may pay {1}{W} and exile a creature card from your graveyard rather than pay this spell's mana cost.
Flying

Grim Bounty

Destroy target creature or planeswalker. Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Chapel Shieldgeist

Flying, first strike
Each creature you control has ward {1}. (Whenever it becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.)
If Chapel Shieldgeist would be put into a graveyard from anywhere, exile it instead.

Chaplain of Alms

First strike
Ward {1} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.)
Disturb {3}{W} (You may cast this card from your graveyard transformed for its disturb cost.)

Chaplain of Alms // Chapel Shieldgeist

Silverquill Pledgemage

Magecraft — Whenever you cast or copy an instant or sorcery spell, Silverquill Pledgemage gains your choice of flying or lifelink until end of turn.

Study Break

Tap up to two target creatures.
Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

Humiliate

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. Put a +1/+1 counter on a creature you control.

Mascot Exhibition

Create a 2/1 white and black Inkling creature token with flying, a 3/2 red and white Spirit creature token, and a 4/4 blue and red Elemental creature token.

Expanded Anatomy

Put two +1/+1 counters on target creature. It gains vigilance until end of turn.

Rise of Extus

Exile target creature. Exile up to one target instant or sorcery card from a graveyard.
Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

Guiding Voice

Put a +1/+1 counter on target creature.
Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)