Per graphic novel standards, I Wish follows immediately behind the previous entry, New Rules. We learned that at the end of Season Eight, Buffy destroyed the existence of magic on the Earthly plane. By the end of Season Nine, she restored magic to save her sister, Dawn. However, the restoration of magic comes void of rules, leaving Buffy and her friends to rewrite its laws. But there's a large catch. Rewriting the laws of magic is privy to creating a “monkey’s paw” effect. What is that you ask? Well, it’s having a wish granted with some ugly–many times drastic–side effects. (Background: The term “monkey’s paw” is derived from a short horror story of the same name, written by W. W. Jacobs. In Jacobs’ “Monkey’s Paw," a sergeant of the British Army is given a magical monkey’s paw that grants him three wishes. Wary of the consequences, the sergeant tries to relieve himself of the paw. Unfortunately, his family obtains it and proceeds to have their wishes granted. In turn, this leads to… well… I'll let you discover the rest.)
Nevertheless, drawing back to my point, Buffy and her friends are aware of this (they've had years of experience with the repercussion of magic). So given the power to recreate the rules of magic, without careful and hyper-unambiguous wording on their part, could obliterate everything they’ve worked so hard to protect. Seriously, Buffy, Willow, Xander, and Giles were the guardians of the Hellmouth back when Sunnydale was sunny. Now they've graduated to guardians of Earth where the stakes are too astronomical to even think about. Obviously no one is touching rewriting magic before all thoughts of reason are considered, assembled, and re-assembled by all parties involved (which includes every filum of monsters outside of the Slayer's nucleus). Until then, creating the rules of magic is off limits.
Except Buffy and her friends aren’t so free of the beneficial possibilities and potentials recreating the rules could have on their personal and individual circumstances. Nor is the new trio of mega-Big Bads trying to pick Buffy's team off to rewrite their own, destructive rules. And this is where I Wish truly, and I mean truly, earns its title. Simply stated, I Wish maintains the character-driven atmosphere loved most inside the Buffyverse.