Actually, I was planning to first do spells like entangle (not finished), fireball (not finished), lightning bolt, cone of cold, and various druid spells... mostly levels 1-5 or so. (My game is still like 1% done, so I dunno when I will have the chance to have PCs cast finger of death or blade barrier or whatever yet...)
I had tried a light spell before (effect: blindness), but it didn't look too good...
Still looking forward to the day when summoning spells can be implemented
