Draiss cursed as his attempt to create and Ice Wall hemisphere failed for some reason, and guessed he had tried to make it too low. He watched her approach the party, relying on pure speed and her invisibility to keep them from taking her down, and considered which option to stop her would be best. He decided to have one of the air elementals grapple her, and directed the one closest to the fleeing bard to intercept and pin her down. If she somehow evaded the grapple attempt, he would cast hold monster on her.