Board Thread:Fun and Games/@comment-28610838-20161207235240/@comment-25856498-20170107133015

Since you said "no loss of crown tower", one can assume that the tower somehow survived the 30 Spear Goblins on its own (some got pushed into the range of the other tower)

Next person is hit by Lockhart's Memory Charm, sometime before the moment he ended up Obliviating himself.