The study reports the discovery of superconductivity in 5-degree twisted bilayer WSe$_2$ (tWSe$_2$) with a maximum critical temperature of 426 mK. The superconducting state appears in a limited region adjacent to a metallic state with Fermi surface reconstruction, believed to arise from antiferromagnetic order. A sharp boundary is observed between the superconducting and magnetic phases at low temperatures, suggesting spin-fluctuation-mediated superconductivity. The results establish that moiré flat-band superconductivity extends beyond graphene structures, offering a broader parameter space for superconductivity due to material properties unique to transition metal dichalcogenides (TMDs) such as native band gaps, large spin-orbit coupling, spin-valley locking, and magnetism. The study also explores the interplay between superconductivity and magnetic order, finding that the superconducting pocket shrinks as temperature increases, and the phase transition between the magnetic and superconducting states is sharply defined. The nature of the superconductivity is discussed, suggesting it may be unconventional, induced by non-phonon mechanisms, and mediated by spin fluctuations.The study reports the discovery of superconductivity in 5-degree twisted bilayer WSe$_2$ (tWSe$_2$) with a maximum critical temperature of 426 mK. The superconducting state appears in a limited region adjacent to a metallic state with Fermi surface reconstruction, believed to arise from antiferromagnetic order. A sharp boundary is observed between the superconducting and magnetic phases at low temperatures, suggesting spin-fluctuation-mediated superconductivity. The results establish that moiré flat-band superconductivity extends beyond graphene structures, offering a broader parameter space for superconductivity due to material properties unique to transition metal dichalcogenides (TMDs) such as native band gaps, large spin-orbit coupling, spin-valley locking, and magnetism. The study also explores the interplay between superconductivity and magnetic order, finding that the superconducting pocket shrinks as temperature increases, and the phase transition between the magnetic and superconducting states is sharply defined. The nature of the superconductivity is discussed, suggesting it may be unconventional, induced by non-phonon mechanisms, and mediated by spin fluctuations.