A multiwavelength view of A2254, a massive 1.5–3 × 10¹⁵ M_⊙ cluster undergoing a major merger that injects turbulence in the ICM. Symbols mark the positions of Hα candidates selected through our NB survey (small empty circles), those confirmed to be Hα at the cluster redshift (large circles), and emitters confirmed to be at other redshifts (crosses). Filled symbols show the confirmed Hα candidates with spectroscopy available through our project. Left: our NB image targeting Hα at the cluster redshift is shown in grayscale, with X-ray emission from XMM-Newton tracing the ICM in pink contours and radio observations from NVSS in green contours, highlighting locations of radio galaxies and the diffuse emission associated with the ICM. Right: the same X-ray image is shown in the background with radio contours overlaid.