On March 9, 2014 at Lockdown, Hardy made his return under the ring name Willow. On July 24, Kurt Angle announced the return of Jeff Hardy with his old ring name. After his brother Matt returned to TNA, they formed a tag team again. On the April 17, 2015 edition of Impact, taped on March 14, The Hardys won an Ultimate X match for the vacant TNA World Tag Team Championship against Austin Aries and Bobby Roode, Bram and Ethan Carter III, and the Beatdown Clan (Kenny King and Low Ki). On May 8, 2015, the Hardys had to give up the TNA World Tag Team Championship because Jeff was injured and it was impossible for the Hardys to defend the titles. After his brother became a heel in 2016, they started a feud with each other. The feud ended on July 5, 2016, when Jeff lost to his brother, forcing Jeff to remove the Hardy name. For a while he performed under the ring name Brother Nero and had to serve as an assistant to Matt Hardy. The brothers then feuded against Decay (Abyss and Crazzy Steve) for the TNA World Tag Team Championship. At Bound for Glory, the Hardys defeated Decay in what was called "The Great War" to win the TNA World Tag Team Championship for a second time. On February 27, the Hardys announced they would leave TNA and the TNA World Tag Team Championships were vacated.