The Lego set 4002021 is an employee exclusive set, not available for purchase through normal retail channels, making it a rare and unique collectible.

The set contains 1320 pieces, making it a moderately sized set with a good balance of complexity and build time.

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The cost-per-brick ratio of the set is around $0.098, which is considered a good value compared to other Lego sets.

The set took around 2 hours and 34 minutes to build, with a cost-per-minute of build time of around $0.84.

The set features a temple, a Christmas tree, a dragon, and Garmadon's sleigh, as well as several minifigures, making it a diverse and interesting build.

The set honors the 10th anniversary of the Ninjago theme, which is one of Lego's most successful homegrown intellectual properties.

The set was given as a Christmas gift to Lego employees and business partners in 2021, making it a unique and exclusive collectible.

The set's packaging and display potential are considered excellent, making it a great addition to any Lego collection.

The minifigures included in the set are customized with unique accessories and designs, making them highly collectible.

The set's build process has been reviewed and featured in several online videos and articles, showcasing its complexity and design.

The set's design is inspired by the Ninjago theme, which is known for its Asian-inspired architecture and mythology.

The set's unique features, such as the Christmas tree and Garmadon's sleigh, make it a great addition to any Lego winter village or holiday display.

Despite being an employee exclusive set, the set's value is estimated to be around $214, making it a valuable addition to any Lego collection.

The set's brick count and complexity make it suitable for experienced Lego builders and collectors.

The set's unique and exclusive nature has sparked interest among Lego enthusiasts and collectors, making it a highly sought-after item.