Rhystic Syphon

Unless target player pays {3}, that player loses 5 life and you gain 5 life.

Paralyze

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted creature's controller, that player may pay {4}. If the player does, untap the creature.

Runeboggle

Counter target spell unless its controller pays {1}.
Draw a card.

Merfolk Looter

Roar of Jukai

If you control a Forest, each blocked creature gets +2/+2 until end of turn.
Splice onto Arcane—An opponent gains 5 life. (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Maggot Carrier

When this creature enters, each player loses 1 life.

Kodama's Reach

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Damnation

Destroy all creatures. They can't be regenerated.

Grist, the Plague Swarm

+1: Create a 1/1 black and green Insect creature token, then mill two cards. Put a deathtouch counter on the token if a black card was milled this way.
−2: Destroy target artifact or enchantment.
−6: For each creature card in your graveyard, create a token that's a copy of it, except it's a 1/1 black and green Insect.

Grist, Voracious Larva

Deathtouch
Whenever Grist or another creature you control enters, if it entered from your graveyard or you cast it from your graveyard, you may pay {G}. If you do, exile Grist, then return it to the battlefield transformed under its owner's control.

Grist, Voracious Larva // Grist, the Plague Swarm

Rath's Edge

{T}: Add {C}.
{4}, {T}, Sacrifice a land: Rath's Edge deals 1 damage to any target.

Necrite

Whenever this creature attacks and isn't blocked, you may sacrifice it. If you do, destroy target creature defending player controls. It can't be regenerated.

New Frontiers

Each player may search their library for up to X basic land cards and put them onto the battlefield tapped. Then each player who searched their library this way shuffles.

Lifeforce

Order of the Ebon Hand

Protection from white
{B}: This creature gains first strike until end of turn.
{B}{B}: This creature gets +1/+0 until end of turn.

Unsummon

Return target creature to its owner's hand.

Mind Maggots

When this creature enters, discard any number of creature cards. For each card discarded this way, put two +1/+1 counters on this creature.

Rootwater Diver

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

No Mercy

Whenever a creature deals damage to you, destroy it.

Spinal Graft

Enchant creature
Enchanted creature gets +3/+3.
When enchanted creature becomes the target of a spell or ability, destroy that creature. It can't be regenerated.

Mimeoplasm, Revered One

As Mimeoplasm enters, exile up to X creature cards from your graveyard. It enters with three +1/+1 counters on it for each creature card exiled this way.
{2}: Mimeoplasm becomes a copy of target creature card exiled with it, except it's 0/0 and has this ability.

Magma Mine

{4}: Put a pressure counter on this artifact.
{T}, Sacrifice this artifact: It deals damage equal to the number of pressure counters on it to any target.

Ersatz Gnomes

{T}: Target spell becomes colorless.
{T}: Target permanent becomes colorless until end of turn.

False Memories

Mill seven cards. At the beginning of the next end step, exile seven cards from your graveyard.

Diabolic Edict

Target player sacrifices a creature of their choice.

Entomb

Search your library for a card, put that card into your graveyard, then shuffle.

Mitotic Slime

When this creature dies, create two 2/2 green Ooze creature tokens. They have "When this token dies, create two 1/1 green Ooze creature tokens."

Pull Under

Target creature gets -5/-5 until end of turn.

Snag

You may discard a Forest card rather than pay this spell's mana cost.
Prevent all combat damage that would be dealt by unblocked creatures this turn.

Ransack

Look at the top five cards of target player's library. Put any number of them on the bottom of that library in any order and the rest on top of the library in any order.

Volrath's Shapeshifter

As long as the top card of your graveyard is a creature card, this creature has the full text of that card and has the text "{2}: Discard a card." (This creature has that card's name, mana cost, color, types, abilities, power, and toughness.)
{2}: Discard a card.

Entropic Specter

Flying
As this creature enters, choose an opponent.
Entropic Specter's power and toughness are each equal to the number of cards in the chosen player's hand.
Whenever this creature deals damage to a player, that player discards a card.

Plaguebearer

{X}{X}{B}: Destroy target nonblack creature with mana value X.

Reaping the Graves

Return target creature card from your graveyard to your hand.
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Infernal Genesis

At the beginning of each player's upkeep, that player mills a card. Then they create X 1/1 black Minion creature tokens, where X is the milled card's mana value.

Mind's Desire

Shuffle your library. Then exile the top card of your library. Until end of turn, you may play that card without paying its mana cost.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

Metamorphose

Put target permanent an opponent controls on top of its owner's library. That opponent may put an artifact, creature, enchantment, or land card from their hand onto the battlefield.

Liquify

Counter target spell with mana value 3 or less. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Shape of the Wiitigo

Enchant creature
When this Aura enters, put six +1/+1 counters on enchanted creature.
At the beginning of your upkeep, put a +1/+1 counter on enchanted creature if it attacked or blocked since your last upkeep. Otherwise, remove a +1/+1 counter from it.

Darksteel Gargoyle

Flying
Indestructible (Damage and effects that say "destroy" don't destroy this creature.)

Slinking Skirge

Flying
{2}, Sacrifice this creature: Draw a card.

Mana Reflection

If you tap a permanent for mana, it produces twice as much of that mana instead.

Deadly Rollick

If you control a commander, you may cast this spell without paying its mana cost.
Exile target creature.

Swamp

Soulless Revival

Return target creature card from your graveyard to your hand.
Splice onto Arcane {1}{B} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Pili-Pala

Flying
{2}, {Q}: Add one mana of any color. ({Q} is the untap symbol.)

Ensnaring Bridge

Creatures with power greater than the number of cards in your hand can't attack.

Doubling Season

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

Rite of Consumption

As an additional cost to cast this spell, sacrifice a creature.
Rite of Consumption deals damage equal to the sacrificed creature's power to target player or planeswalker. You gain life equal to the damage dealt this way.

Rampaging Aetherhood

Trample, ward {2}
At the beginning of your upkeep, you get an amount of {E} (energy counters) equal to this creature's power. Then you may pay one or more {E}. If you do, put that many +1/+1 counters on this creature.

Knight of Dusk

{B}{B}: Destroy target creature blocking this creature.

Marker Beetles

When this creature dies, target creature gets +1/+1 until end of turn.
{2}, Sacrifice this creature: Draw a card.

Island

Forest

Plated Spider

Reach (This creature can block creatures with flying.)

Instill Energy

Enchant creature
Enchanted creature can attack as though it had haste.
{0}: Untap enchanted creature. Activate only during your turn and only once each turn.

Pithing Needle

As this artifact enters, choose a card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Diamond Kaleidoscope

{3}, {T}: Create a 0/1 colorless Prism artifact creature token.
Sacrifice a Prism token: Add one mana of any color.

Monstrous Growth

Target creature gets +4/+4 until end of turn.

Ravenous Skirge

Flying
Whenever this creature attacks, it gets +2/+0 until end of turn.

Goham Djinn

{1}{B}: Regenerate this creature.
This creature gets -2/-2 as long as black is the most common color among all permanents or is tied for most common.

Ivy Elemental

This creature enters with X +1/+1 counters on it.

Liege of the Hollows

When this creature dies, each player may pay any amount of mana. Then each player creates a number of 1/1 green Squirrel creature tokens equal to the amount of mana they paid this way.

Cursed Flesh

Enchant creature
Enchanted creature gets -1/-1 and has fear. (It can't be blocked except by artifact creatures and/or black creatures.)

Might of Oaks

Target creature gets +7/+7 until end of turn.

Skirge Familiar

Endless Cockroaches

When this creature dies, return it to its owner's hand.

Quicksilver Dragon

Flying
{U}: If target spell has only one target and that target is this creature, change that spell's target to another creature.
Morph {4}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)