Spliff's Wonder Bubbles

By means of this enchantment, a priest calls forth 1d4 bubbles, plus one bubble for every level he or she has attained. The bubbles shoot forth from the priest's fingertips in a 10-foot-wide stream that is 3 feet long per level of the caster. For example, a 6th level priest releases 1d4+6 bubbles in a stream 10 feet wide and 18 feet long. The priest makes an attack roll against the Armor Class of each creature caught in the stream. A bubble that strikes releases a variable spell effect (see table). Bubbles that do not strike a creature pop for no effect.