In any dedicated dino-deck, it's gonna be among the best card draw options you can run, and likely an auto-include
Sure, you can use it as a one-of-mana ramp effect, sacrificing Sakura-Tribe Elder to go get a basic land, but it can be so much more
Whenever a permanent you control is turned face up, you draw a card and you lose 1 life
In some cases, glimmers will appear exactly like the characters you know and love, while others will be fantastically reimagined
Final Showdown There are instant-speed board wipes, especially for smaller creatures, but Final Showdown drops as the best of a very limited field
Usher allows us to get something on those turns, even if its not the most impactful thing in the abstract