Mountain

Megrim

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

Scuzzback Scrapper

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Goblin Skycutter

Sacrifice Goblin Skycutter: It deals 2 damage to target creature with flying. That creature loses flying until end of turn.

Warren Pilferers

When Warren Pilferers enters the battlefield, return target creature card from your graveyard to your hand. If that card is a Goblin card, Warren Pilferers gains haste until end of turn.

Goblin Deathraiders

Go for the Throat

Mudbutton Torchrunner

When Mudbutton Torchrunner dies, it deals 3 damage to any target.

Boggart Forager

{R}, Sacrifice Boggart Forager: Target player shuffles their library.

Goblin Piker

Goblin Arsonist

When Goblin Arsonist dies, you may have it deal 1 damage to any target.

Boggart Ram-Gang

Haste
Wither (This deals damage to creatures in the form of -1/-1 counters.)

Caterwauling Boggart

Goblins you control and Elementals you control have menace. (They can't be blocked except by two or more creatures.)

Mind Rot

Spiderwig Boggart

When Spiderwig Boggart enters the battlefield, target creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Festering Goblin

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

Goblin Balloon Brigade

{R}: Goblin Balloon Brigade gains flying until end of turn.

Goblin Outlander

Frogtosser Banneret

Haste
Goblin spells and Rogue spells you cast cost {1} less to cast.

Wretched Banquet

Destroy target creature if it has the least power or is tied for least power among creatures on the battlefield.

Boartusk Liege

Trample
Other red creatures you control get +1/+1.
Other green creatures you control get +1/+1.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Swamp

Terror

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

Sorin's Thirst

Sorin's Thirst deals 2 damage to target creature and you gain 2 life.

Runes of the Deus

Enchant creature
As long as enchanted creature is red, it gets +1/+1 and has double strike. (It deals both first-strike and regular combat damage.)
As long as enchanted creature is green, it gets +1/+1 and has trample.

Bloodcrazed Goblin

Bloodcrazed Goblin can't attack unless an opponent has been dealt damage this turn.

Boggart Birth Rite

Return target Goblin card from your graveyard to your hand.

Goblin Tunneler

{T}: Target creature with power 2 or less can't be blocked this turn.

Bog Hoodlums

Bog Hoodlums can't block.
When Bog Hoodlums enters the battlefield, clash with an opponent. If you win, put a +1/+1 counter on Bog Hoodlums. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

Diabolic Tutor

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

Murderous Redcap

When Murderous Redcap enters the battlefield, it deals damage equal to its power to any target.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Mind Shatter

Target player discards X cards at random.

Boggart Harbinger

When Boggart Harbinger enters the battlefield, you may search your library for a Goblin card, reveal it, then shuffle and put that card on top.

Mudbrawler Raiders

Mudbrawler Raiders can't be blocked by blue creatures.

Tattermunge Duo

Whenever you cast a red spell, Tattermunge Duo gets +1/+1 until end of turn.
Whenever you cast a green spell, Tattermunge Duo gains forestwalk until end of turn. (It can't be blocked as long as defending player controls a Forest.)

Goblin Rimerunner

{T}: Target creature can't block this turn.
{S}: Goblin Rimerunner gains haste until end of turn. ({S} can be paid with one mana from a snow source.)

Boggart Sprite-Chaser

As long as you control a Faerie, Boggart Sprite-Chaser gets +1/+1 and has flying.