The End Bleeding into the Overworld like the Nether.

Have a very rare Monument that would be somewhat of an Anomaly that bleeds the End into the Overworld, similar to the Nether Portal ruins, with its own special loot pool of items.

New Variation of mobs as well, like End versions of Animals found in the Overworld/Nether only near the monument or found within the End instead of it being just Shulkers, End Dragon, and Endermen if places bleed into another, with newer sound effects to match its End Asthetic.