PART 1 : CHALLENGE DESCTIPTION
Where it reads:
You could not live with your own failure. And where did that bring you? Back to me. The soul egg is all about manipulation of the living and dead souls. Reveal to me your knowledge of dead languages and you shall have your egg.
PART 2 : GETTING THE FLAG
One thing you could do is to try guessing what each character stands for:
I marked the cipher for each unique character there is:
There are 14 total characters and if you substitute rceaster to the first 8 characters you also get the following:
If you also consider the characters consisting of dots and lines to be numbers:
With only a few characters left to guess, you eventually get:
Which gives you the flag!!
Or if you don’t like guessing, you could use this (Atlantean Alphabet):