You must have a "Searing Fire Wall" a "Bonfire Colossus", and a "Flamvell Firedog" in your hand, as well as at least two "Laval" monsters in your Graveyard. You will also need to have set this card (Kickfire) in a previous turn. This Set Card and a set "Laval Miller" makes the perfect start to this OTK. Also, having two or more Kickfires set can guarantee this OTK does 4000 damage, and Battle Damage should finish the opponent off.
You must first have two "Lavals" in your grave. You activate "Searing Fire Wall" and banish two (Or more, if you have them) and Summon as many Tokens as possible using its ability. Then, you Special Summon "Bonfire Colossus" from your hand, and then his second effect occurs (If you have not already played "Kickfire" by now, do so before the resolution of "Bonfire's" ability) and it destroys two of your tokens. This puts Counters on your "Kickfire," allowing its effect to be used next turn. Multiple "Kickfires" can easily do massive damage to the opponent.
For even more damage, combo this with a "Flamvell Firedog"- you can Destroy an opponent's monster, and summon a monster like "Laval Lancelord" and do massive damage with "Lancelord" and "Colossus".
"Goka, the Pyre of Malice", similar to Bonfire Colussus, can be Special Summoned from the hand instead of Tributing, but at this cost of one of your Monsters immediately afterwards. This works well with Kickfire, but, since Bonfire Colussus can destroy two Monsters and Goka, the Pyre of Malice can only destroy one, Bonfire Colusssus is arguably better in this case (unless you don't want to destroy too many of your Monsters, in which case Goka, the Pyre of Malice would be better after all).