Season 2 overseer reward wand, Mindrender's Heavy Wand of Blazes ... wants ammo. On a hunch, I'd say check all wands added for season 2 to make sure they don't have the same copy pasta error.
Just as a data point, I tried arrows, crossbow bolts and compressed flame essences (and half the compressed essence recipes no longer seem to accept the primaries that they should, but that's a testing tale for another day) and can't find any ammo that works as an interim solution. (Moral: never convert your old wand into a weapon essence until you're sure the shiny new fabled one isn't bugged)