TOI-2084 light curves obtained with ground-based facilities. Left panel: light curve obtained with SPECULOOS-North in the I+z Alter on UTC August 17 2020. Middle panel: TOI-2084 field-of-view with nearby stars. The wide co-moving companion TOI 2084B is directly south. Right panel: light curve obtained with LCO-McD in the Sloan-i′ filter on UTC August 26 2020. Red and blue data points show the target (T1) and nearby star (T3) light curves, respectively. During the expected transit of TOI-2084.02, we twice detected a deep eclipse (≈400 ppt) on the nearby star TIC 1271317080 (ΔT = 4.98) at 12.9″ from the target, labeled T3.