Just to clarify, while a card that's immune to non-plot card effects can't be affected by non-plot cards, that immunity does not extend to the immune card's effects, does it? So, if a Lanni player triggers her HoD Iron Throne, for instance, that Response can be cancelled by HCiT, despite the immunity, yes?

It came up recently and I just want to make sure I had it right.

(3.19) Scope of Immunity

Immunity only protects a card itself. Peripheral entities attached to or associated with a card, such as attachments, duplicates, power counters, gold tokens on the immune card, and also including triggered effects originating from the immune card, can still be affected by cards of the type to which that card is immune, as long as the affecting cards do not target the immune card.

ktom said:

Thanks, ktom. I thought that I remembered that being in there but didn't have the FAQ handy when the question arose.