First two: what it curently looks like (noai, silent, holding sword, custom player head, no custom name)
All after that: what happens when i look in certain directions: THE SKELETONS ARE EVERYWHERE!
Important: When i punched the wither skeleton, I got a black screen.
WHAT IS GOING ON!?!
Please force a crash by holding F3+C for 10 or more seconds and attach the report here (and attach your world too).