Everything in the magical realm of Unearth only exists when the Maker writes it onto his pages.  So when he writes a dragon into existence that feeds upon the fear from new love, Jason Bard's feelings for Babs feeds the fire-breathing dragon!  How can Batgirl have the courage to defeat such a dragon when courage itself is full of fear, but choosing to act in the presence of it regardless?  And when you die in Unearth, do you die on Earth?