Mithril slid down from her horse and turned around in time to see the ogre's leader charging. Hurriedly she cast one of her new spells at the creature, watching a green bolt exit her palm and fly toward the ogre.
SpoilerRanged touch attack but I don't know their touch AC. The SRD says it is 8 so I will use that.
Attack (1d20+3)[17]
Damage (2d4)[6]
Acid will last 1 more turn, doing 2d4 damage again.
Seeing the acid hit, she brightened. Maybe they would be able to kill these ogres.