Upgrade or alternative upgrade?

Exactly, they could give him an ability, for example, to place a fire mark with each attack + pyrokinesis; that would be much more useful and wouldn't be overpowered.))) Tail strike: D - when a creature, without using a rune, can attack the main target with battle rage and berserk, and at the same time strike the target behind it with its tail, dealing 75% damage!)))) And that's not bad; there's no battle rage rune, but now there's demand for the Arcat dragon!