By now, my enthusiasm for mana acceleration spells is no secret. Before Rite of Flame existed, I'd already used several other "ritual" cards in my casual decks, including Dark Ritual, High Tide, Dark Ritual, Songs of the Damned, Dark Ritual, Culling the Weak, Dark Ritual, Burnt Offering, Dark Ritual, Sacrifice, Dark Ritual, Bubbling Muck, Dark Ritual, Cabal Ritual, Dark Ritual, Seething Song, Dark Ritual, Spoils of Evil, Dark Ritual, Drain Power, Dark Ritual, Metamorphosis, Dark Ritual, Mana Drain, Dark Ritual, Channel, Dark Ritual, Channel the Suns, and, of course, Dark Ritual. Not Rain of Filth, though. I somehow never got around to using that card until many years later... A lot of Ice Age cards in there, really. More than other sets, anyway. So it was fitting that Coldsnap, the belated sequel to Ice Age, gave us one of the best rituals of all... I contend that Rite of Flame was, sadly, the last really good new "ritual" to show up in a set. WotC seem to dislike this sort of thing now, so I doubt that's going to change in the near future. But novelty and the direction of game design aside, I'd say that for sheer flexibility, ignoring specific niche applications and combos, Rite of Flame is the second-best burst mana accelerant ever.