At this moment, Mu You could have taken measures to interrupt the proceedings, but he didn't. He was curious to see how the other party was planning to confront the out-of-control situation.
[The other party successfully used black magic, the Dark Flame Dragon manifested...]
"Backtrack!"
[...You saw the other party chanting again, and successfully summoning the Dark Flame Dragon...]
"Backtrack!"
...
Mu You kept an eye on the text, backtracking as soon as the other party's spell was successful.
Vivian had mentioned that black magic could never be 100% successful. The most talented person could at most attain a 99% success rate in a single black magic spell. As long as this person did not possess a magic crystal, continuous backtracking would inevitably result in a loss of control!
Indeed, after backtracking more than sixty times, the text finally changed.