Wheres illidan stormrage?

He consumed the skull of guldan a powerful orc sorcerer for the burning legion which gives him tremendous powerful to kill tichondrius one of the dreadlords becoming half elf/demon, follow the campaign in wc3. Now he works for almighty kil'jaeden which in return for great magics.

Illidan wasnt blind until the great wars, he had two pair sets of different colored eyes according to the book, wiki has it the other way around, which was foresaw great promise in the future for him, one story has it that all demon hunters are blind so that they can heightened there senses to a different level to hunt demons.