[4] Magnus Warming made his Brøndby IF debut at the age of 16 years and 348 days as the youngest player ever in the club history when he was brought on for the final ten minutes in the 3–0 away defeat against SønderjyskE on 21 May 2017.

[13][14] On 9 July 2021, it was announced that Warming had signed a three-year contract with Serie A club Torino.

[15][16] He made his debut on 17 October in the 1–0 away loss to Napoli, coming on as a late substitute for Ben Lhassine Kone.

[19] On 1 August, he scored his first goal for Darmstadt in a 3–0 away win against FC Ingolstadt in the DFB-Pokal.

[20] On 21 July 2023, Eliteserien club Brann announced the signing of Warming on a four-and-a-half-year contract,[21] for an estimated transfer fee of NOK 8 million (€700,000).