If you are trying to get Jizoh from 5* to 6*, you have to feed him 5 5* heroes. 

Any heroes?

You probably don't want to level Jizoh to 6* though, he's pretty bad. Your starter champion is a better choice. 

You can sacrifice any heroes. You don't want to sacrifice good heroes, so it's the best way to level up 5 useless rares or uncommen to 5 star, they serve as food.

Is Jizoh that bad?? When I looked at his stats, I thought he was pretty good.

I have seen many Jizohs, some better than others.  His ratings say he is best in arena both off and def. Not much else. Depends also how far you are willing to go with masteries and artifacts and books (12).

I think most give up on him after awhile when they see all the other champs that are out there.

There are certainly worse champions, but there are also many better ones and it sounds like the OP was going for their first 6*, so their starter would be a better choice than Jizoh. 

I definetely agree, the first 6* should be the starter and the second an epic or legendary

I have also the impression that Jizoh would be the first 6* champion for the OP. I would recommend to 6* the starter not Jizoh.

Thanks guys.

make sure your food is not Locked ,,, that would be the only reason food doesnt show up