Red should have an aura of some sort. How to make an aura that doesn't suck? Red doesn't normally mind long-term card disadvantage if its getting something now. So have an aura which does part of the job of playing a new creature or burn spell: getting more creatures through to do damage to the opponent.

Could tweak mana cost. Originally was "a creature of opponent's choice can't block" but was way too fiddly. This felt fairly generous, but wanted it to be somewhat playable.

Gets serious points for the name. But I'm entertained that being On Fire doesn't actually harm the creature in any way...

­:) Thank you, me too.

Yeah, I was imagining a pyrokinetic, who's very paniced, but not harmed by the fire. But I agree it'd always look strange, I could always move the flavour to something else. Or add "must attack", since that adds to the paniced feel, and reassures me that there is a downside to the aura as well (very small, since this isn't very good if you're not attacking)