Ursula is of course from The Little Mermaid and is the main villain in the story, created all the way back in 1989
If the copied commander is copying something else, then the token enters as whatever that creature copied, with the stated exception
Overall, the Power Nine are more than just cards
Hurkyls Recall Unstable is an artifact-heavy set where players will be activating Contraptions left and right
For example, if three Fraying Sanity Auras are attached to one player who had four cards put into their graveyard this turn, X will be four for the first ability to resolve, eight for the second, and sixteen for the third.
Test prints make it into the public's hands either through error, or more commonly through people with connections to former WotC employees