I was looking through the posters people made for the NLR/SE event, so I took my OC, Celestia's advisor, Lightpoint, who was created during and for the event as well, and I was inspired to make my own. (If he was the type who would be a poster stallion for this sorta thing…)
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Font is Pirates of Cydonia

Lightpoint edited from a screenshot of Svengallop from The Mane Attraction

Princess Celestia's cutie mark by BlackGryph0n
https://www.deviantart.com/blackgryph0n/art/Princess-Celestia-Cutie-Mark-209185555

Saluting vector by Starshade
https://www.deviantart.com/l-starshade/art/MLP-Base-6-827938728
https://derpibooru.org/images/2341849