If the target creature is an illegal target as Y'shtola Rhul's ability tries to resolve, it won't resolve and none of its effects will happen
However, the localization of Final Fantasy 6, where the creatures first appeared, called them Cactrot', which was later modified to Cactuar'. Interestingly, later Final Fantasy games adopted both names
In the case where the target creature is copying something else when Echoing Assault's second ability resolves, then the token enters as whatever that creature copied, except it's a 1/1
Finally, there's a new Gift Bundle that has a box that evokes Spidey's earliest comic appearance and includes a Collector Booster and 9 Play Boosters, as well as a foil alternate-art promo card and other goodies like full-art lands
A class of card that sees a lot of discussion, mainly around just how many you should be running in your deck
Caves of Chaos Adventurer takes the initiative when it enters the battlefield, and with trample, it can easily take it back should your opponent deal damage to you