Board Thread:Roleplaying/@comment-26245872-20150107222248/@comment-26245872-20150108174507

"It really depends. Manipulation of Ash could be useful in the future if what the Elder Scrolls say is true. Water allows you to manipulate... well water. You can use it to call sea serpents to help you too. Blood manipulation is as dangerous as the caster it is to the target,  but it can help control minds and blood circulation with the use of your own blood. It also uses Blood for power instead of actual magicka too."

Vigarde explained.