Acidic Slime

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When this creature enters, destroy target artifact, enchantment, or land.

Elvish Visionary

Tendrils of Agony

Target player loses 2 life and you gain 2 life.
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Future Sight

Play with the top card of your library revealed.
You may play lands and cast spells from the top of your library.

Baleful Strix

Flying, deathtouch
When this creature enters, draw a card.

Breeding Pool

({T}: Add {G} or {U}.)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

Emergence Zone

{T}: Add {C}.
{1}, {T}, Sacrifice this land: You may cast spells this turn as though they had flash.

Beastcaller Savant

Haste
{T}: Add one mana of any color. Spend this mana only to cast a creature spell.

Reclamation Sage

When this creature enters, you may destroy target artifact or enchantment.

Ravenous Chupacabra

When this creature enters, destroy target creature an opponent controls.

Leyline of Anticipation

If this card is in your opening hand, you may begin the game with it on the battlefield.
You may cast spells as though they had flash.

Dream Halls

Rather than pay the mana cost for a spell, its controller may discard a card that shares a color with that spell.

Massacre Girl

Menace
When Massacre Girl enters, each other creature gets -1/-1 until end of turn. Whenever a creature dies this turn, each creature other than Massacre Girl gets -1/-1 until end of turn.

Eternal Witness

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

Ezuri, Renegade Leader

{G}: Regenerate another target Elf.
{2}{G}{G}{G}: Elf creatures you control get +3/+3 and gain trample until end of turn.

Oppression

Whenever a player casts a spell, that player discards a card.

Aetherflux Reservoir

Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.
Pay 50 life: This artifact deals 50 damage to any target.

Panharmonicon

If an artifact or creature entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Command Tower

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

Priest of Titania

{T}: Add {G} for each Elf on the battlefield.

Sea Gate Oracle

When this creature enters, look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Intruder Alarm

Creatures don't untap during their controllers' untap steps.
Whenever a creature enters, untap all creatures.

Fblthp, the Lost

When Fblthp enters, draw a card. If it entered from your library or was cast from your library, draw two cards instead.
When Fblthp becomes the target of a spell, shuffle Fblthp into its owner's library.

Food Chain

Exile a creature you control: Add X mana of any one color, where X is 1 plus the exiled creature's mana value. Spend this mana only to cast creature spells.

Wellwisher

{T}: You gain 1 life for each Elf on the battlefield.

Yarok, the Desecrated

Deathtouch, lifelink
If a permanent entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Words of Waste

{1}: The next time you would draw a card this turn, each opponent discards a card instead.

Essence Warden

Whenever another creature enters, you gain 1 life.

Meteor Golem

When this creature enters, destroy target nonland permanent an opponent controls.

Beast Whisperer

Whenever you cast a creature spell, draw a card.

Mystic Snake

Flash
When this creature enters, counter target spell.

Aluren

Any player may cast creature spells with mana value 3 or less without paying their mana costs and as though they had flash.

Bolas's Citadel

You may look at the top card of your library any time.
You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost.
{T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

Drowned Catacomb

This land enters tapped unless you control an Island or a Swamp.
{T}: Add {U} or {B}.

Temple of Mystery

This land enters tapped.
When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
{T}: Add {G} or {U}.

Dusk Legion Zealot

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

Recycle

Skip your draw step.
Whenever you play a card, draw a card.
Your maximum hand size is two.

Cloudkin Seer

Flying
When this creature enters, draw a card.

Shriekmaw

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
When this creature enters, destroy target nonartifact, nonblack creature.
Evoke {1}{B} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Merchant of Secrets

Death Match

Whenever a creature enters, that creature's controller may have target creature of their choice get -3/-3 until end of turn.

Wirewood Lodge

{T}: Add {C}.
{G}, {T}: Untap target Elf.

Sunken Hollow

({T}: Add {U} or {B}.)
This land enters tapped unless you control two or more basic lands.

Wistful Selkie

Woodland Cemetery

This land enters tapped unless you control a Swamp or a Forest.
{T}: Add {B} or {G}.

Alchemist's Refuge

{T}: Add {C}.
{G}{U}, {T}: You may cast spells this turn as though they had flash.

Carnival of Souls

Whenever a creature enters, you lose 1 life and add {B}.

Llanowar Elves

Elves of Deep Shadow

{T}: Add {B}. This creature deals 1 damage to you.

Skyscanner

Opulent Palace

This land enters tapped.
{T}: Add {B}, {G}, or {U}.

Wall of Blossoms

Defender
When this creature enters, draw a card.

Quirion Elves

As this creature enters, choose a color.
{T}: Add {G}.
{T}: Add one mana of the chosen color.

Generous Stray

Darkwater Catacombs

Snow-Covered Swamp

Cadaver Imp

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

Snow-Covered Island

Null Profusion

Ice-Fang Coatl

Flash
Flying
When this creature enters, draw a card.
This creature has deathtouch as long as you control at least three other snow permanents.

Frilled Mystic

Flash
When this creature enters, you may counter target spell.

Big Game Hunter

When this creature enters, destroy target creature with power 4 or greater. It can't be regenerated.
Madness {B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Tangleroot

Whenever a player casts a creature spell, that player adds {G}.

Watery Grave

({T}: Add {U} or {B}.)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

Soul of the Harvest

Trample
Whenever another nontoken creature you control enters, you may draw a card.

Cadaverous Bloom

Exile a card from your hand: Add {B}{B} or {G}{G}.

Fyndhorn Elves

Paradise Druid

This creature has hexproof as long as it's untapped. (It can't be the target of spells or abilities your opponents control.)
{T}: Add one mana of any color.

Multani's Acolyte

Echo {G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, draw a card.

Overgrown Tomb

({T}: Add {B} or {G}.)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

Boreal Druid

Snow-Covered Forest

Choked Estuary

As this land enters, you may reveal an Island or Swamp card from your hand. If you don't, this land enters tapped.
{T}: Add {U} or {B}.

Urborg Elf

Horizon Chimera

Flash
Flying, trample
Whenever you draw a card, you gain 1 life.

Guardian Project

Whenever a nontoken creature you control enters, if it doesn't have the same name as another creature you control or a creature card in your graveyard, draw a card.

Elvish Mystic

Hinterland Harbor

This land enters tapped unless you control a Forest or an Island.
{T}: Add {G} or {U}.

Phyrexian Rager

Rogue Refiner

When this creature enters, draw a card and you get {E}{E} (two energy counters).

Magus of the Future

Coiling Oracle

When this creature enters, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.