If you want to create a dragon, try through making a thoughtform or tulpa.
Otherwise, no. You cannot create a physical dragon. There are not physical dragon.
Magic works through the unseen and inner world. It does not break the laws of nature. You cannot conjure fireballs, physically shapeshift, physically fly, etc.
Magic is about manifesting your will and intent, manipulating the strings of fate in your favor, and making alliances in Elphame, and using your mind efficiently.
Anyone who tells you they created a dragon, is lying. Unless of course, they'd be willing to post proof.