Bog Imp

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

Marsh Viper

Whenever Marsh Viper deals damage to a player, that player gets two poison counters. (A player with ten or more poison counters loses the game.)

Goblin Shrine

Enchant land
As long as enchanted land is a basic Mountain, Goblin creatures get +1/+0.
When Goblin Shrine leaves the battlefield, it deals 1 damage to each Goblin creature.

Bog Rats

Bog Rats can’t be blocked by Walls.

Kjeldoran Knight

Banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature’s combat damage, not its controller, among any of the creatures it’s being blocked by or is blocking.)
: Kjeldoran Knight gets +1/+0 until end of turn.
: Kjeldoran Knight gets +0/+2 until end of turn.

Sibilant Spirit

Flying
Whenever Sibilant Spirit attacks, defending player may draw a card.

Ashen Ghoul

Haste
: Return Ashen Ghoul from your graveyard to the battlefield. Activate this ability only during your upkeep and only if three or more creature cards are above Ashen Ghoul.

Flow of Maggots

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Flow of Maggots can’t be blocked by non-Wall creatures.

Dire Wolves

Dire Wolves has banding as long as you control a Plains. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature’s combat damage, not its controller, among any of the creatures it’s being blocked by or is blocking.)

Bog Imp

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

Marsh Viper

Whenever Marsh Viper deals damage to a player, that player gets two poison counters. (A player with ten or more poison counters loses the game.)

Marsh Viper

Whenever Marsh Viper deals damage to a player, that player gets two poison counters. (A player with ten or more poison counters loses the game.)

Terror

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

Terror

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

Bog Imp

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

Order of the Ebon Hand

Protection from white
: Order of the Ebon Hand gains first strike until end of turn.
: Order of the Ebon Hand gets +1/+0 until end of turn.

Goblin Grenade

As an additional cost to cast this spell, sacrifice a Goblin.
Goblin Grenade deals 5 damage to any target.

Thallid

At the beginning of your upkeep, put a spore counter on Thallid.
Remove three spore counters from Thallid: Create a 1/1 green Saproling creature token.

Thallid Devourer

At the beginning of your upkeep, put a spore counter on Thallid Devourer.
Remove three spore counters from Thallid Devourer: Create a 1/1 green Saproling creature token.
Sacrifice a Saproling: Thallid Devourer gets +1/+2 until end of turn.

Necrite

Whenever Necrite attacks and isn’t blocked, you may sacrifice it. If you do, destroy target creature defending player controls. It can’t be regenerated.

Svyelunite Priest

, : Target creature gains shroud until end of turn. Activate this ability only during your upkeep. (It can’t be the target of spells or abilities.)