On a school field trip to Forever Fall, after forcing Jaune to collect sap from the trees, Cardin, with the rest of his team, brings Jaune Arc to a cliff overlooking the area where the rest of the students are.
Cardin then tells Jaune to throw a jar of red sap at his own teammate, Pyrrha Nikos, to get back at her for when she previously humiliated Cardin in class.
However, Jaune, unwilling to attack his teammate, throws it at Cardin instead. Infuriated, Cardin responds to this act by beating Jaune up. However, the smell of the red sap attracts a large Ursa, who interrupts Cardin's assault on Jaune and triggers the confrontation.
The appearance of the Ursa causes the entirety of Team CRDL to flee, with the exception of Cardin. The Ursa then proceeds to attack Cardin due to the presence of red sap on his armor.
Cardin tries to defend himself with his mace but it is quickly knocked out of his hand with a swipe from the Ursa. As the Ursa attempts to finish Cardin off, Jaune intervenes, initiating the next phase of the fight against the Ursa.