Expensive 

Alseid of Life's Bounty

Lifelink
{1}, Sacrifice this creature: Target creature or enchantment you control gains protection from the color of your choice until end of turn.

Commander's Sphere

{T}: Add one mana of any color in your commander's color identity.
Sacrifice this artifact: Draw a card.

Discordant Piper

When this creature dies, create a 0/1 white Goat creature token.

Rot-Tide Gargantua

Exploit (When this creature enters, you may sacrifice a creature.)
When this creature exploits a creature, each opponent sacrifices a creature of their choice.

Liesa, Forgotten Archangel

Flying, lifelink
Whenever another nontoken creature you control dies, return that card to its owner's hand at the beginning of the next end step.
If a creature an opponent controls would die, exile it instead.

Ironwright's Cleansing

Tragic Poet

{T}, Sacrifice this creature: Return target enchantment card from your graveyard to your hand.

Bloodthrone Vampire

Sacrifice a creature: This creature gets +2/+2 until end of turn.

Don't Have

Charcoal Diamond

This artifact enters tapped.
{T}: Add {B}.

Mindleech Ghoul

Exploit (When this creature enters, you may sacrifice a creature.)
When this creature exploits a creature, each opponent exiles a card from their hand.

Thraben Inspector

When this creature enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Rottenheart Ghoul

When this creature dies, target player discards a card.

Oblivion's Hunger

Target creature you control gains indestructible until end of turn. Draw a card if that creature has a +1/+1 counter on it. (Damage and effects that say "destroy" don't destroy the creature.)

Lampad of Death's Vigil

{1}, Sacrifice a creature: Each opponent loses 1 life and you gain 1 life.

Impeccable Timing

Impeccable Timing deals 3 damage to target attacking or blocking creature.

Doomed Traveler

When this creature dies, create a 1/1 white Spirit creature token with flying.

Mire's Grasp

Enchant creature
Enchanted creature gets -3/-3.

Slum Reaper

When this creature enters, each player sacrifices a creature of their choice.

Dead Weight

Enchant creature
Enchanted creature gets -2/-2.

Depraved Harvester

Desperate Farmer

Lifelink
When another creature you control dies, transform this creature.

Desperate Farmer // Depraved Harvester

Divine Arrow

Divine Arrow deals 4 damage to target attacking or blocking creature.

Sanctify

Destroy target artifact or enchantment. You gain 3 life.

Oblivion Strike

Devoid (This card has no color.)
Exile target creature.

Garrison Cat

When this creature dies, create a 1/1 white Human Soldier creature token.

Benevolent Bodyguard

Sacrifice this creature: Target creature you control gains protection from the color of your choice until end of turn.

Unlikely Aid

Target creature gets +2/+0 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Guardian Automaton

When this creature dies, you gain 3 life.

Swamp

Final Death

Walking Corpse

Final Payment

As an additional cost to cast this spell, pay 5 life or sacrifice a creature or enchantment.
Destroy target creature.

Bone Shards

As an additional cost to cast this spell, sacrifice a creature or discard a card.
Destroy target creature or planeswalker.

Revoke Existence

Righteous Blow

Righteous Blow deals 2 damage to target attacking or blocking creature.

Spinal Centipede

When this creature dies, put a +1/+1 counter on target creature you control.

Enshrouding Mist

Target creature gets +1/+1 until end of turn. Prevent all damage that would be dealt to it this turn. If it's renowned, untap it.

Fragmentize

Destroy target artifact or enchantment with mana value 4 or less.

Hired Poisoner

Queen's Bay Soldier

Imperious Oligarch

Vigilance
Afterlife 1 (When this creature dies, create a 1/1 white and black Spirit creature token with flying.)

Fleshtaker

Whenever you sacrifice another creature, you gain 1 life and scry 1. (Look at the top card of your library. You may put that card on the bottom.)
{1}, Sacrifice another creature: This creature gets +2/+2 until end of turn.

Ironclad Slayer

When this creature enters, you may return target Aura or Equipment card from your graveyard to your hand.

Disfigure

Target creature gets -2/-2 until end of turn.

Evolving Wilds

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

Undercity Scavenger

When this creature enters, you may sacrifice another creature. If you do, put two +1/+1 counters on this creature, then scry 2.

Opal Palace

{T}: Add {C}.
{1}, {T}: Add one mana of any color in your commander's color identity. If you spend this mana to cast your commander, it enters with a number of additional +1/+1 counters on it equal to the number of times it's been cast from the command zone this game.

Grim Physician

When this creature dies, target creature an opponent controls gets -1/-1 until end of turn.

Workshop Assistant

When this creature dies, return another target artifact card from your graveyard to your hand.

Serrated Scorpion

When this creature dies, it deals 2 damage to each opponent and you gain 2 life.

Unruly Mob

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

Novice Occultist

When this creature dies, you draw a card and you lose 1 life.

Orzhov Cluestone

{T}: Add {W} or {B}.
{W}{B}, {T}, Sacrifice this artifact: Draw a card.

Healer's Hawk

Flying
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Hunted Witness

When this creature dies, create a 1/1 white Soldier creature token with lifelink.

Angelheart Protector

When this creature enters, target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Plains

Reave Soul

Destroy target creature with power 3 or less.

Orzhov Locket

{T}: Add {W} or {B}.
{W/B}{W/B}{W/B}{W/B}, {T}, Sacrifice this artifact: Draw two cards.

Search Party Captain

This spell costs {1} less to cast for each creature you attacked with this turn.
When this creature enters, draw a card.

Puncturing Light

Destroy target attacking or blocking creature with power 3 or less.

Fate Forgotten

Ob Nixilis's Cruelty

Target creature gets -5/-5 until end of turn. If that creature would die this turn, exile it instead.

Orzhov Guildgate

This land enters tapped.
{T}: Add {W} or {B}.

Chaplain's Blessing

Burglar Rat

When this creature enters, each opponent discards a card.

Undercity's Embrace

Target opponent sacrifices a creature of their choice. If you control a creature with power 4 or greater, you gain 4 life.

Soulreaper of Mogis

{2}{B}, Sacrifice a creature: Draw a card.

Forsaken Thresher

At the beginning of your first main phase, add one mana of any color.

Foreboding Statue

{T}: Add one mana of any color. Put an omen counter on this creature.
At the beginning of your end step, if there are three or more omen counters on this creature, untap it, then transform it.

Foreboding Statue // Forsaken Thresher

Gift of Fangs

Enchant creature
Enchanted creature gets +2/+2 as long as it's a Vampire. Otherwise, it gets -2/-2.

Leonin of the Lost Pride

When this creature dies, exile target card from an opponent's graveyard.

Ash Barrens

{T}: Add {C}.
Basic landcycling {1} ({1}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Silumgar Butcher

Exploit (When this creature enters, you may sacrifice a creature.)
When this creature exploits a creature, target creature gets -3/-3 until end of turn.

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Pharika's Libation

Choose one —
• Target opponent sacrifices a creature of their choice.
• Target opponent sacrifices an enchantment of their choice.

Answered Prayers

Whenever a creature you control enters, you gain 1 life. If this enchantment isn't a creature, it becomes a 3/3 Angel creature with flying in addition to its other types until end of turn.

Adamant Will

Target creature gets +2/+2 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)