How can you cure energy drain? I think it sets their attack per round to 1 but im not sure if thats right. Ive never had this happen to me before.

restoration does the trick

priest spell, scrolls, or at a temple

"If You Are Level Drained, Use A Restoration Spell Or Scroll To Restore The Missing Levels. Temples Will Also Help You."

I mean, honestly.... (shakes head)

But as a side note, some Level Drains are temporary. If the Shadow Dragon in the Temple Ruins uses his Breath Weapon on your party, everyone who fails their Save will be Level Drained--but only for a couple of turns. Sure, you'll still need to heal those lost hitpoints back, but that sure beats using up half your store of stolen Restoration scrolls.