Important items in fiction, whether they be a MacGuffin, an Artifact of Power, a specific location, or even a living being, have a habit of having a title incorporating the imagery of a heart. This is often an easy way to indicate something is especially powerful or at the very least important, given how historically, and biologically, the heart has always been seen as one of the most (if not the most) vital components in the human body. Thus an item similarly named can immediately be assumed to be similarly inherently vital, often functioning as the driving power source without which that cool ...