With Blackblade Reforged in your deck, even the most puny, non-aggressive commander can suit up and kill someone with commander damage if you need to, and to my mind it warrants a slot in your deck
Maybe they wanted the biggest Legends Greed collection in the world, or 10 random players decided to upgrade their Commander decks to the original printing of Greed, or a speculator, driven by literal greed, decided to buy all of the copies of Greed to attempt to jack up the price and make a profit
A prime example of a short-lived keyword is ripple
It may only enter with four +1/+1 counters on it, but it doubles the counters on all of your creatures whenever it attacks
Again, minor controversy here as some people feel it's Green stealing from White's slice of the color pie