Star Swirl - The Element of Sorcery

The season 7 finale was, in a word, fantastic. Especially as a D&D player and fan, the adventure themes, camaraderie, magic spells, mysterious locations, and artifacts appearing throughout this episode epitomize everything you could ask for in a fantasy RPG. We also got to see the return of brash, overconfident Twilight who casts a spell first and regrets her actions later. Luckily she has such a strong cast of friends to support her.

I think season 7 has had some of the strongest episodes in the series thus far, and I can't wait to see what season 8 has in store, especially with the Pillars of Equestria still walking the earth!

There are some variants of this pic available at Derpibooru, all as SVG:

The original version, above
An angry, rearing Star Swirl
A "naked" bald version without the robe and hat

The SVG also contains a smiling, rearing version that is unpublished.