The Wand Focus: Efreet's Flame is a wand focus added by Thaumic Tinkerer. When holding right-click, it will smelt any block that can be smelted in a furnace with the output of it also being a block (ex: it will smelt sand into glass).
By combining the flame and excavation foci, you made one that has features from both.
This focus will smelt any blocks in the world that the caster is pointing at, akin to the excavation focus' beam. Only blocks that smelt into other blocks in a mundane furnace will be smelted.