Phlogiston Steed

Whenever you cast a red or black spell, Phlogiston Steed gets +2/+0 and haste until end of turn.
{b/r}, {t}, Sacrifice Phlogiston Steed: Phlogiston Steed deals damage equal to it's power plus 1 to target creature.
"Many here thought this little beasty was the Devil, well... that was before the war with the demons"
- Veteran Stephan, second lieutenant