Bloodmark Mentor

Red creatures you control have first strike.

Bloodshot Trainee

{T}: Bloodshot Trainee deals 4 damage to target creature. Activate only if Bloodshot Trainee's power is 4 or greater.

Bloodfire Colossus

{R}, Sacrifice Bloodfire Colossus: It deals 6 damage to each creature and each player.

Beetleback Chief

When Beetleback Chief enters, create two 1/1 red Goblin creature tokens.

Battle Squadron

Flying
Battle Squadron's power and toughness are each equal to the number of creatures you control.

Blind-Spot Giant

Blind-Spot Giant can't attack or block unless you control another Giant.

Basalt Ravager

When Basalt Ravager enters, it deals X damage to any target, where X is the greatest number of creatures you control that have a creature type in common.

Bloodshot Cyclops

{T}, Sacrifice a creature: Bloodshot Cyclops deals damage equal to the sacrificed creature's power to any target.