Marsh Gas

All creatures get -2/-0 until end of turn.

Murk Dwellers

Whenever this creature attacks and isn't blocked, it gets +2/+0 until end of combat.

Dust to Dust

Nameless Race

Trample
As this creature enters, pay any amount of life. The amount you pay can't be more than the total number of white nontoken permanents your opponents control plus the total number of white cards in their graveyards.
Nameless Race's power and toughness are each equal to the life paid as it entered.

Rag Man

{B}{B}{B}, {T}: Target opponent reveals their hand and discards a creature card at random. Activate only during your turn.

Season of the Witch

At the beginning of your upkeep, sacrifice this enchantment unless you pay 2 life.
At the beginning of the end step, destroy all untapped creatures that didn't attack this turn, except for creatures that couldn't attack.

The Fallen

At the beginning of your upkeep, this creature deals 1 damage to each opponent and planeswalker it has dealt damage to this game.

Uncle Istvan

Prevent all damage that would be dealt to this creature by creatures.

Word of Binding

Worms of the Earth

Players can't play lands.
Lands can't enter the battlefield.
At the beginning of each upkeep, any player may sacrifice two lands of their choice or have this enchantment deal 5 damage to that player. If a player does either, destroy this enchantment.

Ball Lightning

Stormforged Armor

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Haste (This creature can attack and {T} as soon as it comes under your control.)
At the beginning of the end step, sacrifice this creature.

Blood Moon

Brothers of Fire

{1}{R}{R}: This creature deals 1 damage to any target and 1 damage to you.

Exorcist

{1}{W}, {T}: Destroy target black creature.

Cave People

Whenever this creature attacks, it gets +1/-2 until end of turn.
{1}{R}{R}, {T}: Target creature gains mountainwalk until end of turn. (It can't be blocked as long as defending player controls a Mountain.)

Eternal Flame

Eternal Flame deals X damage to target opponent or planeswalker and half X damage, rounded up, to you, where X is the number of Mountains you control.

The Dark