Fantastic chapter, but before I go into specifics, there were a couple of errors I thought I'd mention.
1. Fairly early on, you mention that Bill wear's a dragon fang earring. If he actually did, his ear would likely fall off. He wears dragonhide boots, but we don't know what kind of animal gave up the fang. Hell, it might actually be a grizzly.
2. Luna's letter has a typo, "significatnt" has an extra "t".
3. Harry's letter has the words "the our dear headmaster". Needless to say, the "the" isn't necessary.
Back to the story itself. I liked the further details on wards, and also Bill and Fleur's relationship advice. I hope nothing too terrible happens between Karina and whatsherface.
Looking forward to the next chapter in both of your stories.
Thanks for the review. Bill probably used a shrinking charm on the tooth or maybe Charlie gave him a tooth from a baby/toddler aged dragon. Either way its a dragon tooth. I had already caught error #2, but hadn't seen #3. Right now I am flying solo with no beta at the moment. Glad you are enjoying the story.