Aurelia's Fury and other spells like it allow me to choose any number of targets. As written, it implies I can choose more than X targets.
Can I, for instance, cast Aurelia's Fury where X = 5 and target 5 of my opponent's creatures, as well as all of my heroic creatures, and then choose to deal one damage to each of my opponent's creatures (leaving my creatures unharmed)? Or am I required to choose targets in some way such that the spell affects them (if possible)?