Sacred 2:Skeletal Fortification

Summons a stationary skeletal tower that will fire projectiles at opponents within a certain radius.

Aspect

See also: Sacred 2:Combat Art Modifications

Bronze

Rapid Fire - Increases the skeletal tower's firing rate. (50% increase)
Focus - Reduces the cooldown time for the skeletal tower. (Cooldown = 7.5s -.1s per 3 CA level)

Silver

Gold

Scatter Shot - Adds another projectile to the skeletal tower. (The extra projectile will always fire if there is another monster nearby, so is the recommended mod.)
Perforate - The arrows pierce through their targets and continue on their flight path. (100% chance to pierce, but slim chance there is another monster directly behind the first.)

Casting this under a monster sometimes launches them high up into the air, but apparently only if it kills them on the first hit, which isn't helpful.
Firing frequency increases by 0.1 seconds for every 50 levels of Skeletal Fortification.
If enemy is static (not moving) placing Skeletal Fortification directly underneath certain enemies, like Dragons and Guardians, will enable SF to strike enemy twice. Works best when using Shadow Veil and no summons are present.

Pros

Allows you to target enemies normally not accessible from your present location (i.e. across a river, over/under a bridge)
...

Cons

It is a 'line of sight' CA. Will only strike enemies if it has a clear, unobstructed path to it. (hills, rocks, trees, statues and other objects will block projectiles)
With Scatter Shot mod, only one arrow will be fired if only one enemy is within range.

No modifications, no skills, naked, all stats between 25 and 35 (i.e. a nearly-new character).

Level	Cooldown Time (s)	Regen Time (s)	Total Time (s)	Damage	Duration	Firing Frequency	Projectiles
1	15.0	7.0	22.0	30-30	20.0s	0.8/s	1
2	15.0	9.3	24.3	40-40	20.0s	0.8/s	1