I got the sense of Pottermore as coming from Evermore. It seems a strange expression. It says in the dictionary it is chiefly used for rhetorical effect or in ecclesiastical contexts - it means always. Other definitions say continually, forever and always in the future.
Shakespeare's big vocabulary included this word:
Evermore thanks, the exchequer of the poor from Love Expands
“LADY CAPULET: Evermore weeping for your cousin’s death? What, wilt thou wash him from his grave with tears? An if thou couldst, thou couldst not make him live; Therefore, have done: some grief shows much of love; But much of grief shows still some want of wit. JULIET: Yet let me weep for such a feeling loss. from Romeo and Juliet
Past cure I am, now reason is past care, And frantic-mad with evermore unrest; My thoughts and my discourse as madmen's are, At random from the truth vainly express'd; from a Sonnet
The ecclesiastical references to evermore seem to be mostly in the Old Testament - it has many verses with evermore, but with the message of cruelty and punishment ahead for those who do not obey. Even Psalms with its celebration has the sense of obedience:
Psalms 86:12 I will praise thee, O Lord my God, with all my heart: and I will glorify thy name for evermore.
So I have an explanation of Pottermore - it is expected to always be with us.
In the past, I would have considered this a decorative pumpkin stem. Now I see it as a Millie chewing toy.
