The paper explores the effects of nuclear magnetism on the halo phenomenon in the deformed halo nucleus ${}^{31}$Ne using the time-odd deformed relativistic Hartree-Bogoliubov theory in continuum (TODRHBe). The study is based on the point-coupling density functional and focuses on the experimental-suggested deformed halo nucleus ${}^{31}$Ne. Key findings include: 1. **Nuclear Magnetism Contribution**: Nuclear magnetism contributes 0.09 MeV to the total binding energy of ${}^{31}$Ne. 2. **Kramers Degeneracy Breaking**: The breaking of Kramers degeneracy results in a 0-0.2 MeV splitting in canonical single-particle spectra. 3. **Blocked Neutron Level**: The blocked neutron level has a dominant component of $p$-wave and is marginally bound. Ignoring nuclear magnetism makes the level unbound. 4. **Prolate One-Neutron Halo**: A prolate one-neutron halo is formed around a near-spherical core in ${}^{31}$Ne. 5. **Nucleon Current Distribution**: The nucleon current is mostly contributed by the halo rather than the core, except near the center of the nucleus. 6. **Layered Structure**: A layered structure in the neutron current distribution is observed and studied in detail. The results demonstrate that nuclear magnetism can change the single-particle energies, making an unbound nucleus bound and more stable. This mechanism is particularly interesting for exotic nuclei and could have broader implications for understanding nuclear structure and properties.The paper explores the effects of nuclear magnetism on the halo phenomenon in the deformed halo nucleus ${}^{31}$Ne using the time-odd deformed relativistic Hartree-Bogoliubov theory in continuum (TODRHBe). The study is based on the point-coupling density functional and focuses on the experimental-suggested deformed halo nucleus ${}^{31}$Ne. Key findings include: 1. **Nuclear Magnetism Contribution**: Nuclear magnetism contributes 0.09 MeV to the total binding energy of ${}^{31}$Ne. 2. **Kramers Degeneracy Breaking**: The breaking of Kramers degeneracy results in a 0-0.2 MeV splitting in canonical single-particle spectra. 3. **Blocked Neutron Level**: The blocked neutron level has a dominant component of $p$-wave and is marginally bound. Ignoring nuclear magnetism makes the level unbound. 4. **Prolate One-Neutron Halo**: A prolate one-neutron halo is formed around a near-spherical core in ${}^{31}$Ne. 5. **Nucleon Current Distribution**: The nucleon current is mostly contributed by the halo rather than the core, except near the center of the nucleus. 6. **Layered Structure**: A layered structure in the neutron current distribution is observed and studied in detail. The results demonstrate that nuclear magnetism can change the single-particle energies, making an unbound nucleus bound and more stable. This mechanism is particularly interesting for exotic nuclei and could have broader implications for understanding nuclear structure and properties.