Simon used the entrance to dive inside the tomb and found himself on a dry and dark pathway. Igniting his flame magic, he proceeded forwards and soon arrived in front of a big hall in the middle of which was an Altar.
Although Simon couldn't read those ancient writings, it seemed that all the tombs had an Altar which had the exact same letters written on it. It might have some specific meaning but since he can't interpret it, there was no point dwelling on it.
Behind the Altar, he could see five doors each of which had a different letter written on it. Simon walked in front of one of the doors and tried opening it; however, it was locked. He tried opening the door near it but just like the other one, it seemed to be locked too.
It was not like he did not try opening it using other means, he even channelled his mana into it nonetheless, it remained locked.