The individual Moxen Jet, Pearl, Ruby, Emerald and Sapphire helped define the mana rock as part of Magic s rich and subtle fantasy canon, inspiring imitators up to the present day
In Legacy and Modern we see an abundance of U/R combo decks, and the Modern decks might even be interested in playing Temple of Epiphany
The big risk is that if the thing its attached to dies, the Aura goes to the graveyard too
Most of these creatures are mana dorks or cost reducers to help us actually play our expensive wurms, while a couple fulfill some utility roles we cant use wurms for
Mickey (Iconic) Pressure : Shift Brave Little Prince onto a cheap Mickey, then use Evasive to present an immediate clock
For example, something as simple as Boromir, Warden of the Tower goes infinite with Ratadrabik, as you can sacrifice Boromir to his ability, creating a 2/2 non-Legendary Boromir, tempting that Boromir, and then repeating this cycle until you have drained out the table with any Blood Artist effect