Death Knight Whirlwind

This focusing of the winds of the underworld cause any caught within to be cast about with great force and violence. Bones are easily shattered and mainsails are quickly snapped within the torrents of these fierce winds. The howl of these winds allow no commands to be issued to those trapped within the Whirlwind, rendering those unfortunates helpless until the magiks fade.

One of the main problems with Whirlwinds is that they are uncontrollable. Once cast there is often no telling where it will end up. Often you need fire then run out of the way to avoid damage from your own Whirlwinds. However one benefit of the Whirlwind is that it last a very long time. You can cast it on enemy Peasants mining Gold which will disrupt mining operations much longer than a Death and Decay would. If anything it's more of an annoyance and humorous spell.

Death and Decay is cheaper, more controllable, and causes more damage in most situations.

Whirlwinds can be casts on top of groups of ships to drive them away. While Death and Decay lasts only a short time, Whirlwinds can cause trouble for a long time.

The Whirlwind tip must be exactly on a building to do any damage.