● If an ally giving a mode is removed from play during the movement/hazard phase, the
Ringwraith immediately stops being in that mode, but continues to move to his new site

"Return its controller to your hand if Black Horse leaves active play."
"Return your Ringwraith to your hand if this ally leaves active play."

Generalnie była gdzieś zasada, że jeśli jest sprzeczność zasad z tekstem karty to obowiązuje tekst na karcie. Generalnie myślę, że można to też odnieść do dyskusji na temat legalności "A Malady without Healing".

Playable during the site phase on a non-Ringwraith, non-Wizard character at the same site as a shadow-magic using character.

Wydaje mi się że pierszy zapis jest generalny, a zapis na Black Horse jest niejako wyjątkiem od tego zapisu. Black Horse jest po prostu specyficzny.

Oczywiście, że można, ale co to zmieni w sprawie zagrywania tej karty na postać przeciwnika?

Scout or Ranger only. Playable on a Shadow-hold [S] if one of your scouts is there or on a Ruins & Lairs [R] if one of your rangers is there. An automatic-attack is created at the site against minion companies: Orcs-5 strikes with 8 prowess (detainment). Additionally, automatic-attacks at the site are duplicated (including the new one) against all companies. Discard when site is discarded or returned to your location deck.

A card causing an action as a result of a passive condition must be in play when the
action resolves, or else the action is canceled.

Annotation 9a: If a card is required to be discarded by some passive condition, the
card is discarded immediately when the condition resolves, not in the following chain
of effects.

Annotation 9a: If a card is required to be removed from active play by some passive condition, the
card is removed from active play immediately when the condition resolves, not in the following chain
of effects.