I guess it was, but that spell was impractical in most other fronts; the stupid charge animation and 2 hands requirement kills any master spell; the other 2 spells in particular have an insane cost and will inevitably hurt your allies whenever you cast them; even worse than them are dragonhide, which cost almost as much as fire storm and is completely killed by the casting itself and low duration and the restoration master spells: bane of the undead is probably the most costly spell in the game; it doesn't affects undeads over level 30 unless you have a specific destruction perk and the damage is pretty poor, the other restoration master spell is guardian circle, which could be useful, if the healing was affected by perks or worked on your allies as well.