Let’s come up with some new spells.

I've come up with a new spell, and it's a super spell: Catalyze Storm (a combination of the words "Catalyst" and "Storm"). The idea is that extremely powerful catalytic rays strike all enemy creatures. They kill creatures as a percentage, and if you get 30 units of magic power, you can instantly win the battle because they will kill all enemy units. Strangely enough, this spell doesn't work on creatures that are immune to magic.

Characteristics:

Chaos Magic
6th level
Mana: 200+10 for each unit of "Magic Power," after 30 units, the cost will no longer increase
Percentage of kills: 25%+2.6% for each unit of "Magic Power," after 30 units, the damage will no longer increase