Bog Imp

Flying (This creature can't be blocked except by creatures with flying or reach.)

Uncle Istvan

Prevent all damage that would be dealt to Uncle Istvan by creatures.

Sinkhole

Swamp

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Dark Heart of the Wood

Terror

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

Bad Moon

Bayou

Banshee

{X}, {T}: Banshee deals half X damage, rounded down, to any target, and half X damage, rounded up, to you.

Mind Twist

Target player discards X cards at random.

Will-o'-the-Wisp

Flying (This creature can't be blocked except by creatures with flying or reach.)
{B}: Regenerate Will-o'-the-Wisp. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Murk Dwellers

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

Scavenger Folk

{G}, {T}, Sacrifice Scavenger Folk: Destroy target artifact.

Forest

Season of the Witch

At the beginning of your upkeep, sacrifice Season of the Witch 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.