Note that this does not exist in Minecraft; it was written purely as a fiction article.Stormy Sky is an ancient creeper that lived before Herobrine came. He was a strong deputy that lead his kind well. He was half-brother to Tiger's Roar, and because of that, not everybody trusted him.
Tiger's Roar and Stormy Sky were half-brothers. They never saw each other in childhood but eventually met up when they were older. Tiger's Roar tried to convince him to join up with him to take down the leaders, but Stormy Sky refused. Afterwards, he was appointed deputy. He lead them to many battles and wars against the spiders that left few wounds.
Stormy Sky was alive after Herobrine came, but he never met him. He died about 6 months later.