Pacify the Beast.
That had been the goal of the exercise.
That had always been the goal of every exercise in Study of Magical Beasts class but it was easier to follow when you're facing a creature you have no chance at beating with brute force anyway.
When you face something you can't kill deliberately or accidentally, you become very open to alternatives. That was the point of the exercise. It was the point of Lea putting the class against a Four Stat Beast;
To teach that the conventional approach is not always the best/only approach.
She had picked the Bullcroc particularly for a reason too. It was a nasty thing to face. Far better to face it at the Fourth Circle and with substantial backup than to face it with a squad of Third Circle students only weeks into their first year.
And the means to 'pacify' it were not so simple.