Which edition was that? I remember (and just double-checked) that in 3rd See Invisibility explicitly did let you see ethereal creatures, just as Detect Invisibility did in AD&D.I remember one of my players rolling his eyes when his see invisible spell wouldn't let him perceive ethereal monsters. (They were fighting a ghost.)
"Why do you need so many different ways to @#%$& us over?" he asked, sarcastically. "If you don't want us to see your monsters, fine, but why make us waste our time with stuff like darkvision and blindsight and see invisible?"
Twenty years later and I still don't have a good answer for that.
I don't remember, I thought it was 3E but it was a while ago...it's possible it was 5E and my timeframe is off? I just remember my players were really salty about how some monsters have "super-invisibility" now and it wasn't worth trying to circumvent it.Which edition was that? I remember (and just double-checked) that in 3rd See Invisibility explicitly did let you see ethereal creatures, just as Detect Invisibility did in AD&D.