On May 14, 2019, WWE confirmed that Wilde has signed a contract. In June, it was announced that Wilde would compete in a tournament named the NXT Breakout Tournament, where he made his debut on the June 26 episode of NXT, losing to Angel Garza in the first round of the tournament. Not long after the tournament, Wilde was sidelined with an orbital bone injury.
On the December 13 episode of 205 Live, Wilde made his return and debut on the brand defeating a local competitor. On the April 1 episode of NXT, after a match with Kushida, Wilde was abducted in the parking lot by a van full of men in black clothes and luchadore masks, continuing a previous storyline started when the same happened to Raul Mendoza weeks prior. On the June 10 episode of NXT, Wilde made his return as he, along with Mendoza, were revealed as the mysterious masked men and they aligned themselves with Santos Escobar as they attacked Drake Maverick, thus turning Wilde heel. On the June 17 episode of NXT, Escobar would reveal the name of his new faction with Wilde and Mendoza to be Legado del Fantasma. Escobar, Wilde and Mendoza would once again attack Maverick as Escobar put Maverick through a table. In their first match as a team, Legado del Fantasma defeated Maverick and Breezango in a six-man tag team match on the second night of The Great American Bash event.
Wilde and Mendoza began competing in NXT's tag team division and on 205 Live. At NXT TakeOver: XXX, Wilde and Mendoza faced Breezango (Fandango and Tyler Breeze) and the team of Oney Lorcan and Danny Burch in a triple threat match to determine the number one contenders for the NXT Tag Team Championship, but Wilde and Mendoza would be unsuccessful. On night one of NXT Super Tuesday, Legado lost to Isaiah "Swerve" Scott and Breezango in a street fight when Scott pinned Escobar, leading up to a match between Escobar and Scott for Escobar's Cruiserweight Championship at NXT TakeOver: 31, where Wilde and Mendoza assisted Escobar in retaining the title.
In 2021, Wilde and Mendoza entered the 2021 Dusty Rhodes Tag Team Classic, in which they lost to the eventual winners MSK (Nash Carter and Wes Lee) in the semifinal round. They also faced MSK and Grizzled Young Veterans (James Drake and Zack Gibson) on night one of NXT TakeOver: Stand and Deliver, in a match with the NXT Tag Team Titles on the line, which MSK won. On the night two of Stand and Deliver, Wilde and Mendoza assisted Escobar in defeating the reigning Cruiserweight Champion Jordan Devlin in a ladder match to become the undisputed Cruiserweight Champion. At NXT TakeOver: In Your House, Legado del Fantasma would face NXT North American Champion Bronson Reed and NXT Tag Team Champions MSK in a winners take all six-man tag team match, in which Legado del Fantasma would lose the match.
On the August 24 episode of NXT, Elektra Lopez made her debut assisting Legado Del Fantasma to a win against Hit Row.
On the October 7, 2022 episode of SmackDown, Wilde, alongside Escobar and Mendoza (now under the name Cruz Del Toro), would make his main roster debut by attacking Hit Row before their match. On the March 10 episode of SmackDown, Wilde alongside the rest of Legado del Fantasma helped Rey Mysterio against The Judgment Day, turning face in the process. On the March 31 episode of SmackDown, Rey reformed the Latino World Order and invited Legado del Fantasma to join as a token of appreciation for aiding him in his fight against his son, Dominik, and The Judgment Day. On the November 10 episode of SmackDown, Escobar defected from LWO and removed Zelina Vega, Wilde and Del Toro from Legado del Fantasma the following week. On the December 1 episode of SmackDown, Wilde wrestled his first main roster singles match against Escobar, but was defeated. Wilde and Del Toro participated in the 2024 Dusty Rhodes Tag Team Classic tournament, defeating Chase University's Duke Hudson and Riley Osborne on the January 16, 2024 episode of NXT, but lost to Carmelo Hayes and Trick Williams in the semifinals two weeks later. On night two of the 2024 WWE Draft, the LWO were drafted to the Raw brand.