Force of Nature

Lord of the Pit

Creature — Demon (7/7)

Flying, trample
At the beginning of your upkeep, sacrifice a creature other than Lord of the Pit. If you can't, Lord of the Pit deals 7 damage to you.

Hungry Mist

Creature — Elemental (6/2)

At the beginning of your upkeep, sacrifice Hungry Mist unless you pay .

Ghazbán Ogre

Creature — Ogre (2/2)

At the beginning of your upkeep, if a player has more life than each other player, the player with the most life gains control of Ghazbán Ogre.

Shapeshifter

Artifact Creature — Shapeshifter (0/7)

As Shapeshifter enters the battlefield, choose a number between 0 and 7.
At the beginning of your upkeep, you may choose a number between 0 and 7.
Shapeshifter's power is equal to the last chosen number and its toughness is equal to 7 minus that number.

Craw Giant

Creature — Giant (6/4)

Trample
Rampage 2 (Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.)

Cockatrice

Creature — Cockatrice (2/4)

Flying
Whenever Cockatrice blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.

Craw Wurm

Creature — Wurm (6/4)

Durkwood Boars

Creature — Boar (4/4)

Elven Riders

Creature — Elf (3/3)

Elven Riders can't be blocked except by Walls and/or creatures with flying.

Ironroot Treefolk

Creature — Treefolk (3/5)

Johtull Wurm

Creature — Wurm (6/6)

Whenever Johtull Wurm becomes blocked, it gets -2/-1 until end of turn for each creature blocking it beyond the first.

Thicket Basilisk

Creature — Basilisk (2/4)

Whenever Thicket Basilisk blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.

Primordial Ooze

Creature — Ooze (1/1)

Primordial Ooze attacks each combat if able.
At the beginning of your upkeep, put a +1/+1 counter on Primordial Ooze. Then you may pay , where X is the number of +1/+1 counters on it. If you don't, tap Primordial Ooze and it deals X damage to you.

Leviathan

Creature — Leviathan (10/10)

Trample
Leviathan enters the battlefield tapped and doesn't untap during your untap step.
At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap Leviathan.
Leviathan can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)

Phantasmal Forces

Creature — Illusion (4/1)

Flying
At the beginning of your upkeep, sacrifice Phantasmal Forces unless you pay .

Pirate Ship

Creature — Human Pirate (4/3)

Pirate Ship can't attack unless defending player controls an Island.
: Pirate Ship deals 1 damage to any target.
When you control no Islands, sacrifice Pirate Ship.

Seraph

Creature — Angel (4/4)

Flying
Whenever a creature dealt damage by Seraph this turn dies, put that card onto the battlefield under your control at the beginning of the next end step. Sacrifice the creature when you lose control of Seraph.

Whirling Dervish

Creature — Human Monk (1/1)

Protection from black
At the beginning of each end step, if Whirling Dervish dealt damage to an opponent this turn, put a +1/+1 counter on it.

Dark Maze

Creature — Wall (4/5)

Defender (This creature can't attack.)
: Dark Maze can attack this turn as though it didn't have defender. Exile it at the beginning of the next end step.

Clockwork Beast

Artifact Creature — Beast (0/4)

Clockwork Beast enters the battlefield with seven +1/+0 counters on it.
At end of combat, if Clockwork Beast attacked or blocked this combat, remove a +1/+0 counter from it.
, : Put up to X +1/+0 counters on Clockwork Beast. This ability can't cause the total number of +1/+0 counters on Clockwork Beast to be greater than seven. Activate only during your upkeep.