The Undead's Return was originally made for the CTM Strawberry Jam Competition, which requires the builder to create a map with three wools in under 72 hours.
The map was originally made with 6 wools, however was cut down and later updated to fix any balancing issues.
The map contains 5 moderate sized areas filled with various mobs and obstacles. The difficulty goes from easy to hard, preparing you for the more difficult challenges later.