Flowstone Salamander

Magmasaur

Creature — Elemental Dinosaur (0/0)

Magmasaur enters the battlefield with five +1/+1 counters on it.
At the beginning of your upkeep, you may remove a +1/+1 counter from Magmasaur. If you don't, sacrifice Magmasaur and it deals damage equal to the number of +1/+1 counters on it to each creature without flying and each player.

Sandstone Warrior

Creature — Human Soldier Warrior (1/3)

First strike (This creature deals combat damage before creatures without first strike.)
: Sandstone Warrior gets +1/+0 until end of turn.

Lightning Elemental

Creature — Elemental (4/1)

Haste (This creature can attack and as soon as it comes under your control.)

Rathi Dragon

Creature — Dragon (5/5)

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Rathi Dragon enters the battlefield, sacrifice it unless you sacrifice two Mountains.

Renegade Warlord

Creature — Human Soldier (3/3)

First strike
Whenever Renegade Warlord attacks, each other attacking creature gets +1/+0 until end of turn.

Soltari Guerrillas

Creature — Soltari Soldier (3/2)

Shadow (This creature can block or be blocked by only creatures with shadow.)
: The next time Soltari Guerrillas would deal combat damage to an opponent this turn, it deals that damage to target creature instead.

Canyon Drake

Creature — Drake (1/2)

Flying
, Discard a card at random: Canyon Drake gets +2/+0 until end of turn.

Chaotic Goo

Creature — Ooze (0/0)

Chaotic Goo enters the battlefield with three +1/+1 counters on it.
At the beginning of your upkeep, you may flip a coin. If you win the flip, put a +1/+1 counter on Chaotic Goo. If you lose the flip, remove a +1/+1 counter from Chaotic Goo.

Firefly

Creature — Insect (1/1)

Flying
: Firefly gets +1/+0 until end of turn.

Flowstone Giant

Creature — Giant (3/3)

: Flowstone Giant gets +2/-2 until end of turn.

Flowstone Wyvern

Creature — Drake (3/3)

Flying
: Flowstone Wyvern gets +2/-2 until end of turn.

Lowland Giant

Creature — Giant (4/3)

Wild Wurm

Creature — Wurm (5/4)

When Wild Wurm enters the battlefield, flip a coin. If you lose the flip, return Wild Wurm to its owner's hand.

Opportunist

Creature — Human Soldier (2/2)

: Opportunist deals 1 damage to target creature that was dealt damage this turn.

Heartwood Giant

Creature — Giant (4/4)

, Sacrifice a Forest: Heartwood Giant deals 2 damage to target player or planeswalker.

Segmented Wurm

Creature — Wurm (5/5)

Whenever Segmented Wurm becomes the target of a spell or ability, put a -1/-1 counter on it.

Bellowing Fiend

Creature — Spirit (3/3)

Flying
Whenever Bellowing Fiend deals damage to a creature, Bellowing Fiend deals 3 damage to that creature's controller and 3 damage to you.

Fireslinger

Creature — Human Wizard (1/1)

: Fireslinger deals 1 damage to any target and 1 damage to you.

Kezzerdrix

Creature — Rabbit Beast (4/4)

First strike
At the beginning of your upkeep, if your opponents control no creatures, Kezzerdrix deals 4 damage to you.

Mawcor

Creature — Beast (3/3)

Flying
: Mawcor deals 1 damage to any target.