Harry Potter Crossword Puzzle

So the JC House Cup has ended.  This means that I spent a few weeks immersed in Harry Potter based tasks.  I thought I'd share one with you.  If you are an Harry Potter fan, now is the time to test your HP knowledge.  See if you can complete my crossword.

Across 1. least popular Headmaster of Hogwarts 3. to turn a wand into a light 5. to summon 8. founder of S.P.E.W. 10. the spell Lockhart used to become famous 11. Luna's roaring hat 15. turns an object into a Portkey 18. The Boy Who Lived 25. useful in healing minor injuries 27. Headmaster when Chamber of Secrets first opened 28. SNEAK 29. Disarming Charm 35. ghost of Gryffindor tower 39. talking to snakes 41. Severing Charm 44. lost an ear 45. before he sparkled 46. the club made up of Slughorn's favorite students 47. Royal 48. sock lover 50. from Rodent to Rapier Down 2. an Unforgivable Curse granting control 4. spell created by Snape and used by Harry on Draco 6. lost his son in the Triwizard Tournament 7. gave Professor Slughorn Francis 9. to open that which is locked 12. Avada Kedavra does this 13. mother of seven 14. incarnation of caster's innermost positive feelings 16. Padfoot was which Sirius Black 17. retired in order to enjoy more time with his remaining limbs 19. Hagrid's dragon 20. listened only to Albus Dumbledore and the Bloody Baron 21. River 22. Hagrid's half-Giant love interest 23. wizard born muggle 24. a spell used to duplicate 26. disguised himself as an armchair 30. hated his R sweater 31. for hours of stair sliding fun 32. non-magical human 33. blasting curse 34. an easy way to move a Christmas tree 36. Harry's first crush 37. worst memory is calling the girl he loved a Mudblood 38. Muggle-born witch or wizard 39. result of Wizard inbreeding 40. Hagrid's first name 42. punched by Granger 43. Romulus 49. inflicts unbearable pain on the recipient