Posted:
In the beginning of the show I always kept asking myself whether Mahir is human or not, does he have any powers or not, in the beginning of the show then I decided he was a normal human being with no powers but now I realized I was wrong I kept thinking about powers in a supernatural sense. I forgot that as human you can hold power as well. Powers that may not allow you to change shapes but allow you to help your loved ones.
When Bella looked at Mahir and then the instrument in Shaans hand. He was able to conclude break the bean break the spell. His common sense and ability to understand incomplete instructions saved everyone.
He was trapped in a fire but he came out alive. Like Mahir told Bella her love saved him but you don't suppose her love took some human form and came to save him. As of now they have showed no third person involved in saving Mahir. He saved himself. His own will of wanting to spend his life with the woman he loved and who loved him. His will power saved him.
At hukum's hideout he notices the fire burning the whatever was blocking the entrance. So he passes through with the help of fire. He keeps track of his surroundings to work through a problem a really normal human way.
Inside the hideout he can't see the magical fire. Normally not being able to see would be considered as a weakness but I don't think that applies in this case. I think as Mahir could not see the fire it didn't bother him to figure out which side of the fire should he jump from. There was no fear at all he just dived in took her and jumped back out.
He might not be able to do things like shape shifting but doing simple things like understanding incomplete instructions, showing will power and courage has helped him as well as caused him to help others out of tight spaces.