Clouds are limited use static projectile spells that conjure magical clouds at the point of casting. The cloud is stationary in this position until it expires, unless modified.
Clouds create a constant stream of droplets of the respective material. The Thundercloud rains down water and periodically fires lightning bolts downwards.
Tips
The droplets falling from the clouds can be used to burst fiery projectiles.
The Rain Cloud is frequently found in the mines level, and so is a perfect way to kill the fiery Stendari which can otherwise be tough to deal with so early in the game.
The Blood Cloud synergizes well with the Vampirism perk.
The Oil Cloud, if lit, can act as a wall of fire.
The Acid Cloud is useful for digging through hard materials as almost nothing is immune against it, except Glass.
Thundercloud creates a powerful crowd control area effect that decimates enemies passing underneath it, especially slower ones, making it ideal for ambushes.