There are better deals out there, efficiency-wise, but none of those will wipe the board and keep your commander alive for more shenanigans post-drawing-15
The archetype is a nice interesting one, much like the one it replaced in my cube (Reanimate), in that it is able to be done across so many colours
It ramps, builds a threat, and fetches a key piece all by itself
Later-pick cards that can slot into multiple archetypes are the glue cards of Limited
Do note that this ability includes cards abilities that are already on the battlefield (such as Docent of Perfections or Talrand, Sky Summoners) as well as cards with the actual ETB effect (such as Basalt Ravager or Ertai Resurrected)
And if youre playing a deck with one or two very important creatures, a single Blossoming Defense can be the difference between losing and winning a match