Look at the top three cards of your library. Put one into your hand and the rest into your graveyard.
Flashback—{B}, Discard a card.

When Ambient Illuminator dies, if you've scried this turn, you gain 3 life and draw a card.

Menace
Whenever Aphonai's Reveler attacks, defending player mills two cards. Then if that player has eight or more cards in their graveyard, Aphonai's Reveler gets +2/+1 and gains lifelink until end of turn.

Menace
Spellcharge 3
You may cast Archaic Straggler from your graveyard if you've spent at least three mana to cast spells this turn.

When Arduous Miners enters, you may have all players discard a card.
Whenever one or more cards leave your graveyard, create a tapped Treasure token.

Menace
When Arrogant Cabalist enters, if you control another Noble, each opponent loses 3 life and you gain 3 life.

Flying
Whenever Arsenal Mentor attacks, teach target attacking creature with lesser power flying.

Target creature gets -3/-3 until end of turn. When that creature dies this turn, create a 1/1 colorless Cyborg artifact creature token.

When Ascend to Power enters, you may sacrifice a creature, discard a card, or pay 3 life. If you do, draw two cards.
You've sacrificed a nonland permanent this turn.
You've discarded a card this turn.
You've lost life this turn.

As an additional cost to cast artifact spells, you may pay {2}. When you do, each opponent sacrifices an untapped creature.

Menace
Whenever you cast an artifact spell, each opponent loses 2 life.

Menace
When Askir enters, each opponent loses life equal to the amount of life they've lost this turn.
Wander—{1}{B}{B}, Pay 4 life.

Deathtouch
If an opponent would lose life, they lose that much life plus 1 instead.
Spellcharge 3

Whenever Augmented Ruffians attacks, integrate the top card of defending player's library.
Augmented Ruffians gets +1/+1 for each card integrated onto it.

Menace
Drop — Whenever Avatar of the Decks or another creature you control enters, if the entering creature was cast, sacrifice a permanent unless you didn't cast any creature spells during your last turn.

Flying
Favored
Whenever your Champion attacks, you may double its power until end of turn. If you do, sacrifice it at the beginning of the next end step.

When Barbarous Roughrider enters or leaves the battlefield, each opponent loses 2 life unless they sacrifice a nontoken creature.
Wander {4}{B}{B}

When Beckoner of Ends enters, target player discards a card. Integrate that card.
Beckoner of Ends has deathtouch as long as a land card is integrated onto it.

{4}{B}{B}, Exile Begin the Imperial Era from your hand: At the beginning of your next upkeep, you may cast Begin the Imperial Era from exile without paying its mana cost. Activate only as a sorcery.
You draw three cards and each opponent discards three cards. Each player loses 3 life.

When Blackout Grifter enters, each opponent loses 1 life and you gain 1 life.
Cybersoul {3}{B}

When Bleakheart Instructor enters, put a lifelink counter on target creature you control.

Flash
When Blightfang Zyxthax enters, discard a card. If you do, it gains deathtouch until end of turn.

Lifelink
Whenever you gain life, you may pay {B}. If you do, put a +1/+1 counter on target creature you control with lifelink.
{4}{B}: Whenever you gain life this turn, each opponent loses that much life.

Flying
When Blue Collar Bloodsucker enters, you gain 2 life. Then if you control a red permanent, Blue Collar Bloodsucker deals 2 damage to each opponent.

At the beginning of your end step, if a creature card or creature token was put into your graveyard from anywhere this turn, surveil 1.