ĐHN SASUKE 2021: Sofia the First 2

ĐHN SASUKE 2021: Sofia the First 2 was the ninth season of ĐHN SASUKE, as well as the second season after Orm Marius's kanzenseiha in ĐHN SASUKE Rising 2020. This was the second season of 2021. It is also in conjunction of 9th anniversary of 2013 Disney animation film Sofia the First, hence it is named "Sofia the First 2", which stands for "Sofia the First Edition 2" where the previous edition was during the third season.

Obstacles
Compared to the previous season, there a few changes made into the course:
 * The First Stage only featured one new obstacle, the Floating Boards, taking over the Sofia the First's old position from the previous season.
 * The Second Stage saw the Sofia the First was shifted to the second obstacle of the stage, thus replacing the Swing Ladder from the previous season. Another new obstacle was introduced, the Spider Flip, replacing the Snap Back from the previous season as the seventh obstacle.
 * On the Third Stage, the Flying Bar and Flying Slider both served a new design. The Flying Slider was modified once again, along with a new design.

As a part of ĐHN SASUKE's 10th Anniversary Project

 * Since this season was a part of ĐHN SASUKE's 10th Anniversary Project, the top 10 competitors this season were pre-selected to completed on ĐHN SASUKE 2021: 10th Anniversary, and later also on SSAS 13.

Logo
Due to it is the second Sofia the First's special event of ĐHN SASUKE, the ninja's face on the regular ĐHN SASUKE's logo since ĐHN SASUKE: Ninja Warrior Season 6 was replaced by Princess Sofia's face. This face was firstly designed by Nguyễn Việt Anh, based of an Inazuma Sofia's picture that nam7ccoathang had from Sofia the First's episode The Mystic Isles, and it was firstly shown as the logo idea of Sofia the First: Road to SASUKE, but it was not used until the premiered of Sofia the First - Road to SASUKE Season 4 (2023). This making ĐHN SASUKE the second competition that used Inazuma Sofia as the mascot.

Obstacles
① Sonic Woodpost (Trụ Sóng)

② Devil Swing (Quỷ Đu) +

③ Dipping Drop (Đường Trượt Rơi)

④ Woodpost Stairs (Cầu Thang Ống)

⑤ Double Pendulum (Cú Nhảy Phi Thường Kép)

⑥ Warped Lumberjack (Tường Tiều Phu)

⑦ ^Floating Boards (Ván Treo)

⑧ Triple Drops (Đu Xà Rơi) +

⑨ Chimney Climb (Leo Tường Nhện)

Time limit: 145 seconds (180 seconds for women competitors)

^ - Denotes New Obstacle

* - Denotes Modified Obstacle

Obstacles
① Cannonball Grip (Bóng Trụ)

② Sofia the First (Thử thách Sofia the First)

③ Up-Down Salmon Ladder (Lên/Xuống Thang Cá Hồi)

④ Jumping Spider (Người Nhện Nhảy) +

⑤ Spider Drop (Nhện Rơi)

⑥ ^Spider Flip (Cú nhảy của nhện)

⑦ Double Tilt Ladder (Thang Lật)

⑧ Water Tackle Wall (Đầy Tường ở Dưới Nước)

⑨ Box Lift (Nâng Thùng)

Time limit: 150 seconds (200 seconds for women competitors)

^ - Denotes New Obstacle

* - Denotes Modified Obstacle

Obstacles
① Cell Cross (Trần Cong)

② Final Drop (Đu Xà Qua Sông) +

③ *Flying Bar (Xà Bay)

④ Shin-Ultimate Crazy Cliffhanger (Bám Vách Nguy Hiểm)

⑤ Bungee Rope Climb (Đu Dây Đàn Hồi) +

⑥ Vertical Limit Kai (Bám Vách Dưới)

⑦ *Flying Slider (Trượt Bay)

^ - Denotes New Obstacle

* - Denotes Modified Obstacle