Theory about Priori Encantatem discrepancy

[Katie]

No: HPFGUIDX 160102

--- In HPforGrownups at yahoogroups.com, dragonkeeper
<dragonkeeper012003 at ...> wrote:
>
> This ancient magic that protected Harry could been lost in Lily's
bloodline and then resurfaced at that time. In the Half Blood Prince,
Petunia gets a howler from Dumbledore about Harry so there must be
something in Lily's bloodline that protects the whole family.
>


Katie

The Howler was actually for OoP when Harry got expelled for the Patronous.

The magic was not lost in Lily's bloodline. It is an ancient magic but
not specific to her bloodline. It has to do with it but not in the
sense I feel you are thinking.

In OoP page 835-836

"But I knew too where Voldemort was weak, And so I made my decision.
  You would be protected by an ancient magic of which he knows, which
he dspises, and which he has always, therefore, underestimated-to his
cost. I am speaking, of course, of the fact that your mother died to
save you. She gave you a lingering protection he never expected, a
protection that flows in your viens to this day. I put my trust,
therefore, in your mother's blood. I delievered you to her sister, her
only remaining relative," (break Harry speaks) "...yes still she took
you, and in doing so, she sealed the charm I placed upon you, Your
mother's sacrifce made the bond of blood the strongest shield I could
give you." (break Harry speaks) "While you can still call home the
place where you mother's blood dwells, there you cannot be touched or
harmed by Voldemort..."

So Harry got protection because his mother died to save him. With the
charm he used Harry needed to be with a blood relative and call their
home his own in order for the spell to work. That is what the Howler
was about reminding Petnia that by him calling their place home it was
protecting him. It doesn't really have to do with an ancient magic
hiding in the blood line it is really about Lily's sacrifice for her
son. LV was not after Lily just Harry.

Katie