Slippery Karst

Slippery Karst enters tapped.
{T}: Add {G}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Flametongue Kavu

When Flametongue Kavu enters, it deals 4 damage to target creature.

Decimate

Destroy target artifact, target creature, target enchantment, and target land. (You can't cast this spell unless you have legal choices for all its targets.)

Mountain

Coal Stoker

When Coal Stoker enters, if you cast it from your hand, add {R}{R}{R}.

Festering Goblin

When Festering Goblin dies, target creature gets -1/-1 until end of turn.

Break Asunder

Destroy target artifact or enchantment.
Cycling {2} ({2}, Discard this card: Draw a card.)

Juggernaut

Juggernaut attacks each combat if able.
Juggernaut can't be blocked by Walls.

Phyrexian Debaser

Flying
{T}, Sacrifice Phyrexian Debaser: Target creature gets -2/-2 until end of turn.

Street Wraith

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

Goblin Medics

Whenever Goblin Medics becomes tapped, it deals 1 damage to any target.

Twisted Experiment

Enchant creature
Enchanted creature gets +3/-1.

Seton's Desire

Enchant creature
Enchanted creature gets +2/+2.
Threshold — As long as seven or more cards are in your graveyard, all creatures able to block enchanted creature do so.

Macetail Hystrodon

First strike, haste
Cycling {3} ({3}, Discard this card: Draw a card.)

Phyrexian Ghoul

Sacrifice a creature: Phyrexian Ghoul gets +2/+2 until end of turn.

Mogg War Marshal

Echo {1}{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.)
When Mogg War Marshal enters or dies, create a 1/1 red Goblin creature token.

Swamp

Symbiotic Beast

When Symbiotic Beast dies, create four 1/1 green Insect creature tokens.

Xira Arien

Flying
{B}{R}{G}, {T}: Target player draws a card.

Undying Rage

Enchant creature
Enchanted creature gets +2/+2 and can't block.
When Undying Rage is put into a graveyard from the battlefield, return Undying Rage to its owner's hand.

Ichor Slick

Target creature gets -3/-3 until end of turn.
Cycling {2} ({2}, Discard this card: Draw a card.)
Madness {3}{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.)

Forest

Primal Boost

Target creature gets +4/+4 until end of turn.
Cycling {2}{G} ({2}{G}, Discard this card: Draw a card.)
When you cycle Primal Boost, you may have target creature get +1/+1 until end of turn.

Crawlspace

No more than two creatures can attack you each combat.

Duress

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Ridgetop Raptor

Double strike (This creature deals both first-strike and regular combat damage.)