I've noticed that if my Wizard runs out of Arcane Power while I'm spamming an ability that costs arcane power, I start shooting little white dots at the enemy which do damage. This surprised me because I would have expected it to default to my primary ability, which doesn't cost any Arcane Power, when I run out of the shiney purple stuff
What attack is this?
Not sure if it matters, but I usually equip wands, so perhaps it's a wand attack? If it is a weapon auto-attack, is this a wand-specific attack or a wizard-specific attack? For example, if I equip a sword instead of a wand, will I start swinging my weapon instead of shooting dots?