Merciless Predator

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Merciless Predator.

Reckless Waif

At the beginning of each upkeep, if no spells were cast last turn, transform Reckless Waif.

Reckless Waif // Merciless Predator

Acidic Slime

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

Caravan Vigil

Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Morbid — You may put that card onto the battlefield instead of putting it into your hand if a creature died this turn.

Farseek

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Elvish Visionary

When Elvish Visionary enters, draw a card.

Bond Beetle

When Bond Beetle enters, put a +1/+1 counter on target creature.

Pathbreaker Wurm

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
As long as Pathbreaker Wurm is paired with another creature, both creatures have trample.

Rolling Temblor

Rolling Temblor deals 2 damage to each creature without flying.
Flashback {4}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Mwonvuli Beast Tracker

When Mwonvuli Beast Tracker enters, search your library for a creature card with deathtouch, hexproof, reach, or trample and reveal it. Shuffle and put that card on top.

Hollowhenge Scavenger

Morbid — When Hollowhenge Scavenger enters, if a creature died this turn, you gain 5 life.

Prey Upon

Target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.)

Geist Trappers

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
As long as Geist Trappers is paired with another creature, both creatures have reach.

Boneyard Wurm

Boneyard Wurm's power and toughness are each equal to the number of creature cards in your graveyard.

Mountain

Forest

Vastwood Gorger

Moonmist

Transform all Humans. Prevent all combat damage that would be dealt this turn by creatures other than Werewolves and Wolves. (Only double-faced cards can be transformed.)

Hamlet Captain

Whenever Hamlet Captain attacks or blocks, other Humans you control get +1/+1 until end of turn.

Desperate Ravings

Draw two cards, then discard a card at random.
Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Rummaging Goblin

Naturalize

Titanic Growth

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

Wreath of Geists

Enchant creature
Enchanted creature gets +X/+X, where X is the number of creature cards in your graveyard.

Ranger's Path

Search your library for up to two Forest cards, put them onto the battlefield tapped, then shuffle.

Krallenhorde Wantons

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Krallenhorde Wantons.

Grizzled Outcasts

At the beginning of each upkeep, if no spells were cast last turn, transform Grizzled Outcasts.

Grizzled Outcasts // Krallenhorde Wantons

Borderland Ranger

When Borderland Ranger enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Festerhide Boar

Trample
Morbid — Festerhide Boar enters with two +1/+1 counters on it if a creature died this turn.

Elder of Laurels

{3}{G}: Target creature gets +X/+X until end of turn, where X is the number of creatures you control.

Briarpack Alpha

Flash (You may cast this spell any time you could cast an instant.)
When Briarpack Alpha enters, target creature gets +2/+2 until end of turn.

Howlpack of Estwald

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Howlpack of Estwald.

Villagers of Estwald

At the beginning of each upkeep, if no spells were cast last turn, transform Villagers of Estwald.

Villagers of Estwald // Howlpack of Estwald

Rampaging Werewolf

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Rampaging Werewolf.

Tormented Pariah

At the beginning of each upkeep, if no spells were cast last turn, transform Tormented Pariah.

Tormented Pariah // Rampaging Werewolf

Evolving Wilds

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