Gilded Bloodscale Dragons often spend hours investigating every minute detail of caves, making sure their living spaces are arranged exactly how they like. They crave intellectual stimulation and get bored easily. As such, these dragons prefer to lure in their prey using their sharp minds rather than brute strength, often engaging in battles of wits between their two heads to determine how best to proceed. Seen as eccentric by other dragons, they are often shunned by all but their own kind.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Two-headed dragons are unique enough to deserve a separate classification from ordinary dragons. They have two necks, two brains, two mouths, but one stomach and one main body. The two heads usually work together, but there are times when they will fight each other, snapping back and forth. Their unique anatomy prevents them from breeding with single-headed dragons.

Sudoku calmly sits atop a hill that overlooks his owner's cave and the surrounding green fields, outlined by majestic moonlit mountains and a smoothly flowing river. He is accompanied by another Bloodscale, Heat-Seeking Missile, whom he has called to join him to hear the explanation of his plot. "Missile, I know you're already aware of my plan," he addresses, shivering as the cold air plagues his scales. She nods, "Take over this land through the use of Sudoku, of course." Sudoku smirks, "Yes. A special kind of Sudoku, too. It is larger than your average Sudoku, and consists of more characters. The numbers zero through nine, the letters A through F!" He heard Missile gasp, asking what Sudoku planned to name this new game. "Hexadecimal Sudoku, of course! And we will use it on our caretaker, Aquenee, so she's distracted and we can take the cave for ourselves!" He pulled out a tablet with an unfinished Sudoku scribbled on it. "Get this to her!" he roared, following up with an evil laugh.