Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Darksteel Citadel

Browbeat

Any player may have Browbeat deal 5 damage to them. If no one does, target player draws three cards.

Mountain

Risk Factor

Target opponent may have Risk Factor deal 4 damage to them. If that player doesn't, you draw three cards.
Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

Goblin Instigator

When Goblin Instigator enters, create a 1/1 red Goblin creature token.

Shrapnel Blast

As an additional cost to cast this spell, sacrifice an artifact.
Shrapnel Blast deals 5 damage to any target.

Darksteel Relic

Indestructible (Effects that say "destroy" don't destroy this artifact.)

Goblin Grenade

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

Kuldotha Rebirth

As an additional cost to cast this spell, sacrifice an artifact.
Create three 1/1 red Goblin creature tokens.

Ornithopter

Doublecast

When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.