Sangrophage

At the beginning of your upkeep, tap this creature unless you pay 2 life.

Fa'adiyah Seer

{T}: Draw a card and reveal it. If it isn't a land card, discard it.

Uktabi Drake

Flying, haste
Echo {1}{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.)

Getting

Mass of Ghouls

Scryb Ranger

Flash
Flying, protection from blue
Return a Forest you control to its owner's hand: Untap target creature. Activate only once each turn.

Coal Stoker

When this creature enters, if you cast it from your hand, add {R}{R}{R}.

Merfolk Thaumaturgist

{T}: Switch target creature's power and toughness until end of turn.

Thallid Shell-Dweller

Defender
At the beginning of your upkeep, put a spore counter on this creature.
Remove three spore counters from this creature: Create a 1/1 green Saproling creature token.

Primal Plasma

As this creature enters, it becomes your choice of a 3/3 creature, a 2/2 creature with flying, or a 1/6 creature with defender.

Have

Basalt Gargoyle

Flying
Echo {2}{R} (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.)
{R}: This creature gets +0/+1 until end of turn.

Drudge Reavers

Flash (You may cast this spell any time you could cast an instant.)
{B}: Regenerate this creature.

Char-Rumbler

Double strike
{R}: This creature gets +1/+0 until end of turn.

Pit Keeper

When this creature enters, if you have four or more creature cards in your graveyard, you may return target creature card from your graveyard to your hand.

Crookclaw Transmuter

Flash
Flying
When this creature enters, switch target creature's power and toughness until end of turn.

Castle Raptors

Flying
As long as this creature is untapped, it gets +0/+2.

Sage of Epityr

When this creature enters, look at the top four cards of your library, then put them back in any order.

Gorgon Recluse

Whenever this creature blocks or becomes blocked by a nonblack creature, destroy that creature at end of combat.
Madness {B}{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.)

Pouncing Wurm

Kicker {2}{G} (You may pay an additional {2}{G} as you cast this spell.)
If this creature was kicked, it enters with three +1/+1 counters on it and with haste.

Whitemane Lion

Flash
When this creature enters, return a creature you control to its owner's hand.

Spiketail Drakeling

Flying
Sacrifice this creature: Counter target spell unless its controller pays {2}.

Pallid Mycoderm

At the beginning of your upkeep, put a spore counter on this creature.
Remove three spore counters from this creature: Create a 1/1 green Saproling creature token.
Sacrifice a Saproling: Each creature you control that's a Fungus or a Saproling gets +1/+1 until end of turn.

Vitaspore Thallid

At the beginning of your upkeep, put a spore counter on this creature.
Remove three spore counters from this creature: Create a 1/1 green Saproling creature token.
Sacrifice a Saproling: Target creature gains haste until end of turn.

Cloudseeder

Flying
{U}, {T}, Discard a card: Create a 1/1 blue Faerie creature token named Cloud Sprite. It has flying and "This token can block only creatures with flying."

Herd Gnarr

Whenever another creature you control enters, this creature gets +2/+2 until end of turn.

Voidmage Husher

Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, counter target activated ability. (Mana abilities can't be targeted.)
Whenever you cast a spell, you may return this creature to its owner's hand.

Saltfield Recluse

{T}: Target creature gets -2/-0 until end of turn.

Nessian Courser

Phantasmagorian

When you cast this spell, any player may discard three cards. If a player does, counter Phantasmagorian.
Discard three cards: Return this card from your graveyard to your hand.

Celestial Crusader

Flash
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Flying
Other white creatures get +1/+1.

Ghost Tactician

{W}, {T}, Discard a card: Creatures you control get +1/+0 until end of turn.

Ironclaw Buzzardiers

This creature can't block creatures with power 2 or greater.
{R}: This creature gains flying until end of turn.

Errant Doomsayers

{T}: Tap target creature with toughness 2 or less.

Sprite Noble

Flying
Other creatures you control with flying get +0/+1.
{T}: Other creatures you control with flying get +1/+0 until end of turn.

Stormfront Riders

Flying
When this creature enters, return two creatures you control to their owner's hand.
Whenever this creature or another creature is returned to your hand from the battlefield, create a 1/1 white Soldier creature token.

Havenwood Wurm

Flash (You may cast this spell any time you could cast an instant.)
Trample

Magus of the Abyss

At the beginning of each player's upkeep, destroy target nonartifact creature that player controls of their choice. It can't be regenerated.

Molten Firebird

Flying
When this creature dies, return it to the battlefield under its owner's control at the beginning of the next end step and you skip your next draw step.
{4}{R}: Exile this creature.

Llanowar Empath

When this creature enters, scry 2, then reveal the top card of your library. If it's a creature card, put it into your hand. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Samite Censer-Bearer

{W}, Sacrifice this creature: Prevent the next 1 damage that would be dealt to each creature you control this turn.

Fomori Nomad

Putrid Cyclops

When this creature enters, scry 1, then reveal the top card of your library. This creature gets -X/-X until end of turn, where X is that card's mana value. (To scry 1, look at the top card of your library, then you may put that card on the bottom.)

Llanowar Mentor

{G}, {T}, Discard a card: Create a 1/1 green Elf Druid creature token named Llanowar Elves. It has "{T}: Add {G}."

Viashino Bladescout

Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, target creature gains first strike until end of turn.

Bog Serpent

This creature can't attack unless defending player controls a Swamp.
When you control no Swamps, sacrifice this creature.

Skirk Ridge Exhumer

{B}, {T}, Discard a card: Create a 1/1 black Zombie Goblin creature token named Festering Goblin. It has "When this token dies, target creature gets -1/-1 until end of turn."

Needlepeak Spider

Bogardan Hellkite

Flash
Flying
When this creature enters, it deals 5 damage divided as you choose among any number of targets.

Goblin Skycutter

Sacrifice this creature: It deals 2 damage to target creature with flying. That creature loses flying until end of turn.

Magus of the Mirror

{T}, Sacrifice this creature: Exchange life totals with target opponent. Activate only during your upkeep.

Blade of the Sixth Pride

Glass Asp

Whenever this creature deals combat damage to a player, that player loses 2 life at the beginning of their next draw step unless they pay {2} before that step.

Greenseeker

{G}, {T}, Discard a card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Stonecloaker

Flash
Flying
When this creature enters, return a creature you control to its owner's hand.
When this creature enters, exile target card from a graveyard.

Aven Augur

Flying
Sacrifice this creature: Return up to two target creatures to their owners' hands. Activate only during your upkeep.

Cloud Elemental

Flying
This creature can block only creatures with flying.

Bogardan Rager

Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, target creature gets +4/+0 until end of turn.

Blind Phantasm

Scarwood Treefolk

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.)

Brain Gorgers

When you cast this spell, any player may sacrifice a creature of their choice. If a player does, counter Brain Gorgers.
Madness {1}{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.)

Muck Drubb

Flash
When this creature enters, change the target of target spell that targets only a single creature to this creature.
Madness {2}{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.)

Augur of Skulls

{1}{B}: Regenerate this creature.
Sacrifice this creature: Target player discards two cards. Activate only during your upkeep.

Mire Boa

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
{G}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Mycologist

At the beginning of your upkeep, put a spore counter on this creature.
Remove three spore counters from this creature: Create a 1/1 green Saproling creature token.
Sacrifice a Saproling: You gain 2 life.

Savage Thallid

At the beginning of your upkeep, put a spore counter on this creature.
Remove three spore counters from this creature: Create a 1/1 green Saproling creature token.
Sacrifice a Saproling: Regenerate target Fungus.

Sparkspitter

{R}, {T}, Discard a card: Create a 3/1 red Elemental creature token named Spark Elemental. It has trample, haste, and "At the beginning of the end step, sacrifice this token."

Llanowar Augur

Sacrifice this creature: Target creature gets +3/+3 and gains trample until end of turn. Activate only during your upkeep.

Ashcoat Bear

Flash (You may cast this spell any time you could cast an instant.)

D'Avenant Healer

{T}: This creature deals 1 damage to target attacking or blocking creature.
{T}: Prevent the next 1 damage that would be dealt to any target this turn.

Watercourser

{U}: This creature gets +1/-1 until end of turn.

Foriysian Interceptor

Flash (You may cast this spell any time you could cast an instant.)
Defender
This creature can block an additional creature each combat.