It does help with getting through Narset and other card draw denial, though
I have to think its the art, the feeling that those 500 copies of Jin-Gitaxias are truly unique, whereas there are thousands of copies of Ragavan out there that look the same as a serialized version only without the xxx/500 printed on there
A new five-color commander in Go-Shintai of Life's Origin, a Shrine that loves everything to do with even more Shines, has dominates plenty of commander games with its incredible consistency
There are currently 14 (fairly old) cards, like Necromancy or Thawing Glaciers, which have a triggered ability that reads, at the beginning of the next cleanup step (those of you who have been paying attention obviously realize that these 14 cards give players priority during the cleanup step!)
The rest of the deck was basically just things to make it reliably able to apply early pressure and staple good black and white cards to keep it competitive