Superconductivity has been observed in 5-degree twisted bilayer WSe₂, with a maximum critical temperature of 426 mK. The superconducting state appears in a limited region of displacement field and density 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, reminiscent of spin-fluctuation mediated superconductivity. The results suggest that moiré flat-band superconductivity extends beyond graphene structures. The unique properties of transition metal dichalcogenides (TMDs), such as a native band gap, large spin-orbit coupling, spin-valley locking, and magnetism, offer the possibility to access a broader superconducting parameter space than graphene-only structures. The study demonstrates that superconductivity in twisted bilayer WSe₂ is stabilized by spin fluctuations, similar to behavior seen in heavy Fermion systems. The superconducting state is found near Van Hove singularities, where the density of states is high, and magnetic order is favored. The superconducting and magnetic phases are closely related, with superconductivity emerging near the magnetic phase boundary. The superconducting state is observed in a narrow window of density and displacement field, adjacent to a resistive metallic state. The superconducting transition is characterized by a sharp downturn in resistance at low temperatures, followed by a long tail that eventually reaches zero within the measurement noise floor. The temperature dependence of the resistivity indicates that the material is metallic at all doping levels and displacement fields, in contrast to previous studies of devices with smaller twist angles. The superconducting state is observed in a narrow window of density and displacement field, adjacent to a resistive metallic state. The superconducting transition is characterized by a sharp downturn in resistance at low temperatures, followed by a long tail that eventually reaches zero within the measurement noise floor. The superconducting state is found near Van Hove singularities, where the density of states is high, and magnetic order is favored. The superconducting and magnetic phases are closely related, with superconductivity emerging near the magnetic phase boundary. The superconducting state is observed in a narrow window of density and displacement field, adjacent to a resistive metallic state. The superconducting transition is characterized by a sharp downturn in resistance at low temperatures, followed by a long tail that eventually reaches zero within the measurement noise floor.Superconductivity has been observed in 5-degree twisted bilayer WSe₂, with a maximum critical temperature of 426 mK. The superconducting state appears in a limited region of displacement field and density 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, reminiscent of spin-fluctuation mediated superconductivity. The results suggest that moiré flat-band superconductivity extends beyond graphene structures. The unique properties of transition metal dichalcogenides (TMDs), such as a native band gap, large spin-orbit coupling, spin-valley locking, and magnetism, offer the possibility to access a broader superconducting parameter space than graphene-only structures. The study demonstrates that superconductivity in twisted bilayer WSe₂ is stabilized by spin fluctuations, similar to behavior seen in heavy Fermion systems. The superconducting state is found near Van Hove singularities, where the density of states is high, and magnetic order is favored. The superconducting and magnetic phases are closely related, with superconductivity emerging near the magnetic phase boundary. The superconducting state is observed in a narrow window of density and displacement field, adjacent to a resistive metallic state. The superconducting transition is characterized by a sharp downturn in resistance at low temperatures, followed by a long tail that eventually reaches zero within the measurement noise floor. The temperature dependence of the resistivity indicates that the material is metallic at all doping levels and displacement fields, in contrast to previous studies of devices with smaller twist angles. The superconducting state is observed in a narrow window of density and displacement field, adjacent to a resistive metallic state. The superconducting transition is characterized by a sharp downturn in resistance at low temperatures, followed by a long tail that eventually reaches zero within the measurement noise floor. The superconducting state is found near Van Hove singularities, where the density of states is high, and magnetic order is favored. The superconducting and magnetic phases are closely related, with superconductivity emerging near the magnetic phase boundary. The superconducting state is observed in a narrow window of density and displacement field, adjacent to a resistive metallic state. The superconducting transition is characterized by a sharp downturn in resistance at low temperatures, followed by a long tail that eventually reaches zero within the measurement noise floor.