Leaving aside the fact that Calvin and the others didn't do anything in the fight against the fire djinns, previously they managed quite good when they had to improvise a shelter against the snow and that was the original purpose of the training.
Besides they "found", the things the Greenwich Sage hid in the ice, so technically they fulfilled the conditions to approve the survival class, so now there was no point in staying at this place.
Still, they couldn't just leave, Aura came here secretly so Richard, Boris and Aliya weren't aware of her presence and all the situation surrounding Dimas was a sensitive subject, so for the time being it will be considered a top secret.
Daimon understood Aura's intention and he nodded as he turned to see his classmates and spoke.
"Don't ask me about what happened here today, also we'll keep Dimas's existence as a secret… for everyone that isn't present right now okay?".
