The Clay portion of this quest requires you to have 50 Clay in your inventory. If you use any of that Clay to make bricks or for building constructions and the amount of clay in your inventory drops - that will effect the amount shown as complete on this portion of the quest - so get the Clay and leave it in inventory until you complete this quest!
Living Hedges that cost coins will update the quest objective, you don't have to spend Rubies
Magic Dust must be found at Neighbors - any clicks can randomly drop it (Gifts do not count)
Triggers 2 Quests: Enchanters Anonymous & Who Wants Some Magic
Time for Dragons - This is the Quest Line that will lead you to all the Dragon Quests!
Triggered upon completion of Quest: Never Stop Learning 2
Make sure if you own a Witch's Hut, you have it out on your land and not in Inventory if you want it to count toward the quest objective, or you will have to build a new one.