Goblin

Fling

As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.

Sacrifice another creature: Blood Bairn gets +2/+2 until end of turn.

Create two 1/1 red Goblin creature tokens.

Bloodcrazed Neonate attacks each combat if able.
Whenever Bloodcrazed Neonate deals combat damage to a player, put a +1/+1 counter on it.

Sacrifice a creature: Bloodthrone Vampire gets +2/+2 until end of turn.

Whenever Pulse Tracker attacks, each opponent loses 1 life.

Sacrifice a creature: Put a +1/+1 counter on Bloodflow Connoisseur.

Lightning Bolt deals 3 damage to any target.

{B}, {T}, Discard a card: Return target creature card from your graveyard to your hand.

Bloodfell Caves enters the battlefield tapped.
When Bloodfell Caves enters the battlefield, you gain 1 life.
{T}: Add {B} or {R}.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.