The card was unparalleled in its ability to 'tutor' and play exactly what a player needed, particularly in a Standard environment full of Artifact decks with many cheap Artifacts to sacrifice
That means sure, she can stop one attack from killing her partner or her, but then you are open to other attacks from other players prior to untapping her
You are setting up an opponents creature for death, and then you can let someone else kill it to get cards and life, in a nice flurry of card advantage akin to a Veteran Explorer or somesuch
O-rings in Magic are legion, and they're often one of the most common types of removal in both paper and Arena Limited environments
Disney Lorcana rules In Disney Lorcana, players take alternating turns, beginning with the first player
"How Magic: the Gathering became a pop-culture hit and where it goes next"