This is how the Ancient Wither looked like when it showed up.
I was playing Minecraft on a short day where I had busy things to do with my life but when I joined the game I decided by going to this temple and it was covered with soul sand and wither skeleton skulls all over the place. I was starting to think was this about the new update or was it just some kind of Easter egg joke? I went directly inside the temple and it was really dark inside the temple but I set off torches to see what was inside it. The only thing inside it was a lot of soul sand but I found this chest made out of soul sand and it was also freaking me out to! I opened the chest and it had a suspicious looking book it said "You came here? For what? Just to start trouble? Exactly you came here to start trouble and now you will understand for what it feels like to start trouble." I got creeped out so I ran out of there and then I was running forward and then I turned around it was GONE! I walked back into my house it became night and then the wither showed up it was looking very scary. A few minutes later I saw the thing again and it killed me! I said in the chat who the heck are you? It answered me it said "Why do you care? You are an ENEMY GET AWAY FROM MY WORLD AND ME!!!" after when it said that it just disappeared it left a soul sand and then a sign saying "Why do you do this?" It was very confusing of how the Ancient Wither did it. So I thought this wither is doing bad things. I put a sign again saying "who are you" a few hours later the Ancient Wither messaged back of the information about him. He said this " I am the Ancient Wither of all the withers..." That was the only thing he said so I messaged him with another question maybe funny or not but I told him this " Are you more powerful then the Wither Storm?" I was waiting for a few hours again and he answered back he said " The Wither Storm? How do you know about it the Wither Storm was believed to be the most powerful wither of all the time but not anymore due to it's death it can't be created again..." So I knew that the Ancient Wither himself knew about it but it was weird how he knew it so badly but as usual I answered him again with another question to him I said "Are you friends with the wither storm?" So I waited a few more minutes and then he answered that quick he said "No... we were never friends at all it was just maddening have the Wither Storm unleashed the ancient prophecy is said never release it but YOU HAVE REALIZED IT HAVEN'T YOU AND NOW YOU WILL SEE, WHY DON'T YOU COME WITH ME INSIDE MY HOME DIRECTLY IN THE CAVE RIGHT BEHIND YOU AND IF YOU DON'T COME YOU WILL SEE WHAT WILL HAPPEN TO YOU!!!" So I went inside the cave he was there until I typed in the chat I said "Why are you here?" I answered to him quietly he said "I am here because this is my time limit of time you see when the first one was created we wanted to make a new world for everyone and A NEW WORLD FOR YOU TOO NOW JOIN ME NOW OR ELSE" He answered to me back so I got terribly scared and I said to him with an answer the answer was no in the chat he said to me " THAT IS IT YOU ARE DONE GOODBYE" Everything turned into NETHERRACKS AND THEN EVERYTHING ELSE WITH SOUL SAND MILLIONS OF GHASTS AND A LOT OF THINGS HAPPEN HORRIFICALLY AND THEN IT GLITCHED SO BADLY AND THEN IT EXITED OUT OF THE GAME and then it left off with an error so different and not very natural so that was it I didn't understand what this "Ancient Wither" was and what did he know but for sure I never want to see him again...
Anyways this was a short story it actually doesn't exist so it was pretty hard for me to think this out but it was worth it you have a nice day!!!! :)