Redshift path of the H I (green), Mg II (orange), C IV (blue), and Si IV (purple) absorption line systems which trace the multiphase gas around LAEs (red) covered by optical-to-NIR spectroscopy in MAGG and shown up to the redshift of the most distant quasar. The coverage of the Mg II at z ≳ 3 (dark orange) is enabled by the new X-shooter observations (Section 2.3). The redshift range of the absorbers extends from redward the Lyα emission of the lowest redshift quasar up to 3000 km s⁻¹ from the redshift of the highest quasar of the sample. Telluric regions are not masked in this figure.