Nether Portal is trapped by Wither Skeletons on the other side.

Terrible. Just Terrible. Imagine my frustration, not being able to combat these Wither Skeletons that are camping right outside my nether portal. The clip shows me going into a portal, still having the "Minecraft" loading screen visible, but hearing my character being hacked to death by 8 wither skeletons & 68 Blazes that will not go away. BRO WHY?