Otk priest (Boomsday)

So, the combo is a bit complicated but it has a lot of potential 

Here it goes in steps

1. play two radiants

2. play a test subject and double its health with divine spirit

3. play a vivid nightmare on the test subject

4.play topsy turvy on the first test subject which kills it and you get a vivid nightmare topsy turvy and a divine spirit

5. play a divine spirit and a vivid nightmare and then a topsy turvy on the second test subject and then you get 2x vivid nightmare + 2x divine spirit and a topsy turvy 

6. play a vivid nightmare on the radiant so you can go infinite with divine spirits vivid nightmares and topsy turvy the oldest test subject of the two you have

7.repeat the combo until you get enough divine spirits in hand to kill your opponent and then play a boar ,place  divine spirits on it and then a topsy turvy it or a minion you had before the combo

8. ???

9. profit