So how DO the members of the Order of the Phoenix communicate with each other?
I was surprised that this particular question won the poll, because the answer (as I've already said) can be found in an already-published book (Goblet of Fire), whereas the other two questions related to book six. But perhaps I was influenced by the fact that I knew the other two questions had interesting answers – and, of course, you will shortly know the answers to those questions anyway!
Members of the Order use their Patronuses to communicate with each other. They are the only wizards who know how to use their spirit guardians in this way and they have been taught to do so by Dumbledore (he invented this method of communication). The Patronus is an immensely efficient messenger for several reasons: it is an anti-Dark Arts device, which makes it highly resilient to interference from Dark wizards; it is not hindered by physical barriers; each Patronus is unique and distinctive, so that there is never any doubt which Order member has sent it; nobody else can conjure another person's Patronus, so there is no danger of false messages being passed between Order members; nothing conspicuous needs to be carried by the Order member to create a Patronus.
And, as many of you have deduced, Dumbledore's Patronus is indeed a phoenix.
Karenanya, fans mengatakan bahwa:
Severus Snape and his Phoenix Patronus
On her site, JKR had a lot of interesting things to say about Patronuses, including: "each Patronus is unique and distinctive, so that there is never any doubt which Order member has sent it; nobody else can conjure another person's Patronus, so there is no danger of false messages being passed between Order members"
If, as I have already argued elsewhere, Snape is a deep cover agent still spying on Voldemort, then he has four possible missions. The first two, assassination and sabotage, are missions more commonly carried out by deep cover agents, since they do not require communication between the agent and his true side. The last two types of mission are misinformation (feeding the people one is spying on false information about one's true side) and intelligence gathering (which is what most laypeople think of as 'spying').
Snape, at the end of Book 6, has a cover as deep as any agent could possibly wish for. However, simple assassination is out: I find it impossible to believe that Snape does not know about Voldemort's horcruxes. Sabotage is possible, but beside the point: no mission other than the final death of Voldemort would be worth the price Dumbledore paid to secure Snape's cover. Therefore, we're left with intelligence gathering: Snape must be trying to find out where Voldemort's horcruxes are, so he can either destroy them himself, or direct others (Order members) to destroy them. But intelligence gathering is one of the missions that absolutely requires an open channel of communication between the agent and his side.
How could Snape possibly get a message out to the Order members? I firmly believe that the only device that could serve that purpose is a Patronus - which as JKR tells us " is an immensely efficient messenger for several reasons: it is an anti-Dark Arts device, which makes it highly resilient to interference from Dark wizards; it is not hindered by physical barriers [...] nothing conspicuous needs to be carried by the Order member to create a Patronus."
But Snape's problem is even worse than that: how could he ensure that his message is believed and trusted by the Order members? Not just any Patronus will do: certainly not Snape's own Patronus, which the other Order members would recognise and distrust. From Tonks' Patronus in Book 6, we know that Patronuses can change their shape in response to a great emotional upheaval. And from JKR's note, we know that "Dumbledore's Patronus is indeed a phoenix." If Snape's Patronus has changed form to Dumbledore's phoenix, surely that would be a sign potent enough to give his messages the credibility they need.
So, in book 7 Snape will have a new and unusually powerful Patronus. And, like Pettigrew, Snape carries a Life Debt - to Harry's father, which was never discharged - and an added burden of guilt over Harry's parents' deaths. What is the foe Snape is uniquely equipped to kill?