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eROSITA comma successfully launched in mid-2019 comma will perform multiple all-sky X-ray surveys. Monitoring roughly half a million AGN-quasars comma eROSITA will identify rare comma accretion ignition-depletion events as they occur. To explore how the X-ray corona and accretion disk respond to a sudden comma major change in accretion rate comma the identified sources need medium signal to noise XMM-Newton ToO openParEPIC+OMclosePar observations to derive meaningful spectral constraints. Thus comma we propose 10 ToOs openParfive with 10 ks -- ignition event five with 60 ks -- depletion eventclosePar each joint with VLT FORS2 imaging and spectroscopy openParfor each ToO 1 hourclosePar for optical counterpart localization and tracking the Broad Line Region.s responses.