Shadow Sight has seem to have lost its see invs portion- as dead eye (the lower equivilant) has kept its see invs portion.
http://everquest.allakhazam.com/db/spell.html?spell=90
I remeber it always giving see invs on classic +
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And not to get into it, but yes D-Cloud agro was a specific nerf that happend either late kunark or velious- shortly before they gave SKs their own "Agro" line of spells.