cosmic eclispe booster box S&M Eclipse and as you might expect Cosmic Eclipse Booster Pack Art

As the face of a Commander precon, its very easy to build around flurry, and provided that you can untap with this card, the next turn is very explosive

Graveyard Overdrive sparked some amount of joy when I saw the lhurgoyf package, so this one wins the fun category, though Im pretty unenthused by everything thats not the lhurgoyf stuff

Voltron decks often feature glass cannons, so you want to kill opponents as quickly as possible

And while she's great (and reasonably popular) as a commander because she's cheap and her attack trigger is one of the best in the format, those same characteristics make her valuable as a card in the 99 as well

Answer #2

Finally, the fact that the creature Self-Destruct targets actually sees it resolving is a big deal in current Standard