The unnamed warrior stallion from Luna Vs. Storytelling (AKA, Luna's late husband) sacrificed his life to make sure the smooze doesn't destroy everyone in Equestria.
"Luna vs. the Dreamlands 2": Luna nonchalantly sentences Discord to what amounts to Eternal Waking. And why? Because Sundance was worried his chaos might have affected her baby. Don't mess with Luna's friends.
What Luna did for fun before "Luna vs. Lodging": she (and we quote Celestia) "reorganized the irrigation system of an entire province, established a whole new system of emergency response and management for the entire kingdom, and made sense of the tax code."