For the most powerful Psychic-types, this allows you to work quickly up to the strongest attacks
There is also Copy Enchantment, I found in my competitive Zur list that having all 3 wasn't a problem very often, they're great to draw if someone has a Rhystic Study/Tithe, there are lots of splashy enchantments out there that are worth grabbing
And for being made of perfect metal, they are precocious little scamps
You can interact with something like Time Stop while it's on the stack, but once it resolves the turn simply ends, and you can no longer interact
An example of this is the Nemesis cycle of Laccolith cards in red that all have the same ability
It remains to be seen whether that change was to fit the theme, with the legendary Pokmon that feature on the artwork, or if this will be standard practice moving forward