Shield and Dagger.
One day, Jake Thompson, a shut in 13 yo gamer collapses and goes into a coma. He wakes up 2 years later and eventfully, that very same day the world changes. The world turns into a fantasy world where there are monster and mythical beasts and beings. The world is made into a testing grounds for constellations to add and remove creatures. Fortunately, the constellations cannot remove humans but can only add them or make them their patron. How will a young teen who have just awokened from coma rise to the top with just a shield and dagger!?!?!?