hmmm so its the skull of a powerful orc warlock huh?  And it gave illidan the information to seek out the tomb of sargaras. 

This just makes me wonder...what was that Old ghost of a powerful orc warlock who entered the tomb of sargaras and died in there in WC 3? I forgot his name . It probably wasn't gul'dan but I just want to know who he was. I forgot.

Anyway how was a warlock skull powerful enough to channel the corruption of all of felwood?