Story:
A scientist discovered that the Wither exists...Then he go to the nether,found a wither skeleton...He took the DNA of the skeleton.He removed the skeleton parts of the DNA.When only the Wither DNA was left,the DNA was completely black!Then he thought that,he can put the "Wither" in a creeper.Thats true!He found a creeper and gave him the "Wither".The creeper became like the actual skin.Now,he is still a creeper (hissing,exploding,CREEPING).BUT his explosion is grey,and when a passive or hostile mob will touch that explosion,it will be withered and have the wither poison...Now if it explode near skeletons,the skeletons will become Wither Skeletons (can be found in Minecraft 1.4.2)...

THE END