Hey guys, I'm gonna be running my first session of Dungeon World tomorrow but I'm a little confused by the wording of the Bard's Arcane Art move. In particular, the fact that it can heal 1D8 Damage. It seems like they can use the ability over and over again, yes? It doesn't get expended like a spell?

Is the intent that Bards can completely recover their party's HP between combats? I see the complication of "unwanted attention" that would be an effective limiting factor in a dungeon, but how is that supposed to work if the PCs are somewhere relatively safe?