Reflexes

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature has first strike. (It deals combat damage before creatures without first strike.)

Claws of Gix

{1}, Sacrifice a permanent: You gain 1 life.

Goblin Patrol

Echo {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.)

Torch Song

At the beginning of your upkeep, you may put a verse counter on Torch Song.
{2}{R}, Sacrifice Torch Song: It deals X damage to any target, where X is the number of verse counters on Torch Song.

Goblin Raider

Blood Vassal

Skittering Skirge

Flying
When you cast a creature spell, sacrifice Skittering Skirge.

Goblin Spelunkers

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)

Heat Ray

Heat Ray deals X damage to target creature.

Lay Waste

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

Carrion Beetles

{2}{B}, {T}: Exile up to three target cards from a single graveyard.

Raze

As an additional cost to cast this spell, sacrifice a land.
Destroy target land.

Darkest Hour

Victimize

Choose two target creature cards in your graveyard. Sacrifice a creature. If you do, return the chosen cards to the battlefield tapped.

Shower of Sparks

Shower of Sparks deals 1 damage to target creature and 1 damage to target player or planeswalker.

Rain of Salt

Priest of Gix

When Priest of Gix enters, add {B}{B}{B}.

Bog Raiders

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Viashino Runner

Menace (This creature can't be blocked except by two or more creatures.)

Reclusive Wight

At the beginning of your upkeep, if you control another nonland permanent, sacrifice Reclusive Wight.

Sneak Attack

{R}: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.

Goblin Offensive

Goblin War Buggy

Haste
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.)

Despondency

Enchant creature
Enchanted creature gets -2/-0.
When Despondency is put into a graveyard from the battlefield, return Despondency to its owner's hand.

Outmaneuver

X target blocked creatures assign their combat damage this turn as though they weren't blocked.

Disciple of Law

Protection from red
Cycling {2} ({2}, Discard this card: Draw a card.)

Polluted Mire

Polluted Mire enters tapped.
{T}: Add {B}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Fiery Mantle

Enchant creature
{R}: Enchanted creature gets +1/+0 until end of turn.
When Fiery Mantle is put into a graveyard from the battlefield, return Fiery Mantle to its owner's hand.

Shivan Gorge

{T}: Add {C}.
{2}{R}, {T}: Shivan Gorge deals 1 damage to each opponent.

Breach

Target creature gets +2/+0 and gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Tainted Aether

Whenever a creature enters, its controller sacrifices a creature or land of their choice.