New spells.

I agree. In the game, 10K damage is unattainable with any spell. But there are also fewer units, right? And therefore, even if the damage is less, it won't be any less significant. And if we're talking about the final battle against an opponent of your level, you'll still inevitably suffer significant losses, and all races have units with high initiative that deal a lot of damage. For example, Emerald Dragons, Riders, Nightmares, Cerberuses, etc. This spell is intended for them. Casting Vengeance on some zombies is almost useless; you can defeat them without it.

If you know the Dominate spell, you can easily defeat her. But you need to dominate the summoned creatures. They don't count at the end of the battle.

Added 2 minutes later
The word *words* in defense of the Crystal spell. If you create one near the enemy archers, the effect will be as if your warriors stood next to those archers. They won't be able to shoot!