Lol 30 mana just to deal 50 damage to each unit in a region? If that was the point of the card, that would be a waste.
xd
Hi there,
The point is not only to damage, but also to remove control of a portal from your opponent. So, the best way to us this would be if either you think the 50 points will outright kill the units on the portal or if by following it up with an attack of your own you can take them out. By doing so you not only grab a portal of your own, but take one from your opponent. And sometimes that can be more important that killing the units.
This can turn that game where they are 1 portal away from winning to their needing 2 and your being 1 step closer to winning!