"Time to follow the elf."
Gale heads down the tunnel that Zaavariel went down, and if she sees a formian, she will attack with a blast of energy.
Spoiler
So move action to get in sight, followed by a standard action for a beshadowed eldritch blast(dc 18 fort or blind for a round)
1 attack(1d20+8)[25] damage(7d6)[27]
2 attack(1d20+8)[27] 13
3 attack(1d20+8)[19] 13