Wildfire Eternal costs less than 6, although this also has the nombo of bricking on the massive sorceries that we're trying to cheat out with it.
When you have Wildfire Eternal and Champion of Rhonas online in the same combat, Champion will trigger first.
If you have dropped Hero of Goma Fada that turn, your creatures will survive this sweeper.
It also seems in line with the deck's strategy to use expensive creatures and sorceries.
two double-pings (dings?) during combat