Dark spell: destruction of inferno tower
It appears we have spells, traps, or troops to pretty much combat every building in the game, except inferno towers. Yes, heroes are supposed to be able to kill them, however, I have noticed the AI doesn't attack inferno towers when they are frozen. It's quite bizarre.
I think there should be a dark spell that does damage much like the earthquake to walls (x4 damage) to the inferno tower. It could be a very small 3 tile radius or something where it will do an exponential effect if you keep dropping the spell. That way you could legitimately kill an inferno tower, but it would have to take say 6 max spells in the DE spell.
There has to be something to combat the inferno (and not just freeze it), especially now that the single target is stronger. There is just too much firepower with max infernos, max xbows, max archer towers, etc. when you go to war. There needs to be a way to 3-star a maxed out base, and the only way to do so is an air attack, it seems like. It's just quite odd. Ground attackers would like some options!