Consider

Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
Draw a card.

Infernal Grasp

Destroy target creature. You lose 2 life.

Thraben Exorcism

Exile target Spirit, creature with disturb, or enchantment.

Play with Fire

Play with Fire deals 2 damage to any target. If a player is dealt damage this way, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Human

Join the Dance

Create two 1/1 white Human creature tokens.
Flashback {3}{G}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

"With Avacyn gone, I no longer knew who to pray to. Alone, I wept for a sister who would never return."

Bereaved Survivor

When another creature you control dies, transform this creature.

"It was Sigarda who lifted me from despair and gave me the strength to fight on."

Dauntless Avenger

Whenever this creature attacks, return target creature card with mana value 2 or less from your graveyard to the battlefield tapped and attacking.

Bereaved Survivor // Dauntless Avenger

Unruly Mob

Whenever another creature you control dies, put a +1/+1 counter on this creature.

Vanquish the Horde

This spell costs {1} less to cast for each creature on the battlefield.
Destroy all creatures.

Geor was determined to stay out until he got a bite from something big.

Baithook Angler

Disturb {1}{U} (You may cast this card from your graveyard transformed for its disturb cost.)

Even in death, he casts his lines, forever fishing for reasons long forgotten.

Hook-Haunt Drifter

Flying
If Hook-Haunt Drifter would be put into a graveyard from anywhere, exile it instead.

Baithook Angler // Hook-Haunt Drifter

Component Collector

Day // Night

If it's neither day nor night, it becomes day as this creature enters.
Whenever day becomes night or night becomes day, you may tap or untap target nonland permanent.

Covetous Castaway

When this creature dies, mill three cards. (Put the top three cards of your library into your graveyard.)
Disturb {3}{U}{U} (You may cast this card from your graveyard transformed for its disturb cost.)

Ghostly Castigator

Flying
When this creature enters, you may shuffle up to three target cards from your graveyard into your library.
If Ghostly Castigator would be put into a graveyard from anywhere, exile it instead.

Covetous Castaway // Ghostly Castigator

Curse of Surveillance

Enchant player
At the beginning of enchanted player's upkeep, any number of target players other than that player each draw cards equal to the number of Curses attached to that player.

Innistrad Checklist

Delver of Secrets // Insectile Aberration

Delver of Secrets

At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If an instant or sorcery card is revealed this way, transform this creature.

"Aha! Yes! Now I hear it, the beautiful poetry of the lights in the sky. I must reach the moon and ask what it all means!"

Insectile Aberration

Devious Cover-Up

Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. You may shuffle up to four target cards from your graveyard into your library.

Dissipate

Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Innistrad: Midnight Hunt