Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Raging Goblin

Haste (This creature can attack and {T} as soon as it comes under your control.)

Goblin Chieftain

Haste (This creature can attack and {T} as soon as it comes under your control.)
Other Goblin creatures you control get +1/+1 and have haste.

Fiery Hellhound

{R}: Fiery Hellhound gets +1/+0 until end of turn.

Goblin Artillery

{T}: Goblin Artillery deals 2 damage to any target and 3 damage to you.

Lava Axe

Lava Axe deals 5 damage to target player or planeswalker.

Canyon Minotaur

Lightning Elemental

Kindled Fury

Target creature gets +1/+0 and gains first strike until end of turn. (It deals combat damage before creatures without first strike.)

Yawning Fissure

Each opponent sacrifices a land of their choice.

Shivan Dragon

Flying
{R}: This creature gets +1/+0 until end of turn.

Magma Phoenix

Flying
When Magma Phoenix dies, it deals 3 damage to each creature and each player.
{3}{R}{R}: Return Magma Phoenix from your graveyard to your hand.

Berserkers of Blood Ridge

Berserkers of Blood Ridge attacks each combat if able.

Trumpet Blast

Attacking creatures get +2/+0 until end of turn.

Firebreathing

Enchant creature
{R}: Enchanted creature gets +1/+0 until end of turn.

Pyroclasm

Pyroclasm deals 2 damage to each creature.

Ball Lightning

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Haste (This creature can attack and {T} as soon as it comes under your control.)
At the beginning of the end step, sacrifice this creature.

Panic Attack

Up to three target creatures can't block this turn.

Goblin Piker

Seismic Strike

Seismic Strike deals damage to target creature equal to the number of Mountains you control.

Burst of Speed

Creatures you control gain haste until end of turn. (They can attack and {T} even if they just came under your control.)

Jackal Familiar

Jackal Familiar can't attack or block alone.

Viashino Spearhunter

First strike (This creature deals combat damage before creatures without first strike.)

Prodigal Pyromancer

{T}: Prodigal Pyromancer deals 1 damage to any target.

Earthquake

Earthquake deals X damage to each creature without flying and each player.

Dragon Whelp

Flying
{R}: Dragon Whelp gets +1/+0 until end of turn. If this ability has been activated four or more times this turn, sacrifice Dragon Whelp at the beginning of the next end step.

Sparkmage Apprentice

When Sparkmage Apprentice enters, it deals 1 damage to any target.

Wall of Fire

Defender (This creature can't attack.)
{R}: Wall of Fire gets +1/+0 until end of turn.

Inferno Elemental

Whenever Inferno Elemental blocks or becomes blocked by a creature, Inferno Elemental deals 3 damage to that creature.

Warp World

Each player shuffles all permanents they own into their library, then reveals that many cards from the top of their library. Each player puts all artifact, creature, and land cards revealed this way onto the battlefield, then does the same for enchantment cards, then puts all cards revealed this way that weren't put onto the battlefield on the bottom of their library.

Stone Giant

{T}: Target creature you control with toughness less than Stone Giant's power gains flying until end of turn. Destroy that creature at the beginning of the next end step.

Ignite Disorder

Ignite Disorder deals 3 damage divided as you choose among one, two, or three target white and/or blue creatures.

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Act of Treason

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.)

Shatter

Siege-Gang Commander

When Siege-Gang Commander enters, create three 1/1 red Goblin creature tokens.
{1}{R}, Sacrifice a Goblin: Siege-Gang Commander deals 2 damage to any target.

Capricious Efreet

At the beginning of your upkeep, choose target nonland permanent you control and up to two target nonland permanents you don't control. Destroy one of them at random.