The file given was decoded using XOR cipher. 
After xoring the text with `RaziCTF{`, I got the key as `VERYSECURE`.
After a few trials, I found the key to be `VERYSECUREKEY`.
The decrypted text was : ```RaziCTF{d0nt_r3pe4T_kEy_1N_X0R} You cannot be buried in obscurity , you are exposed upon a grand theater to the view of the world . If your actions are upright and benevolent , be assured they will augment your power and happiness.```
Flag : `RaziCTF{d0nt_r3pe4T_kEy_1N_X0R}`