MythPony is US artist.
You can follow him on his Tumblr blog.

Dreamweaver, a rather anti-social pony from a small town, has an unusual talisman called the "Dream Pen" which allows her to enter a pocket reality that other ponies call "The Bubble.".
While inside the Bubble, anything she imagines seems as real as life, but outside of it, she's just seen as the oddball of her hometown.
After her family decides it's best she takes a "magical safety class" in Canterlot, "just in case," she is offered exclusive acceptance into a class full of other ponies with... uncommon magical abilities.

You can browse this comic in the DA gallery