Originally Posted by
RSP
However, this also is probably wrong as it completely scraps the idea that a magical effect can be a target (which DM clearly states it can be) by inferring in the answer that only the creature under the effect can be targeted and not the effect itself. It also is probably misleading, if not incorrect, to say “ends a spell” and not “ends spells”.
Not a great example of SAC clarifying a rules question. By RAW you very well can target a magical effect, and I’d imagine it would include the whole of the effect, if you did so.