Lol, what would braid of fire do though? It only adds mana during upkeep, which empties before the draw phase.

You can't play spells, but at most cycle incinerators and activate Siege gang. Its use is far too narrow. The only use I really see Braid of Fire is used for is some variant of UWr Landstill which wishes into Starstorm, Urza's Rage, Stroke of Genius :D