DW Shadow Realm prevents clicking on yourself (and self casting) as a target for most items like Eul Scepter, Ethereal Blade, Mjollnir buff, Force Staff, Urn of shadows/Vessel, Lotus Orb - even ally giving wards to DW is disabled during Shadow Realm.

However it still allows DW to cast on herself items like Glimmer Cape, healing salve, clarity potion.

Dunno is this intended or is it an oversight.