Hearthpwn

Also worth to mention that health of the minion can't be more than 2 billions. If you try to Divine Spirit 1b+ creature, it just dissapear (
I did 1.5b damage with similar deck tho )
- Nat Pagle: you don't need cards, actually you need to stay as long as you can.
+ Emperor because you need to burn your copied cards from Cho.
+ Any "return minion to hand" card, because of silence on Cho.
+ Faceless Manipulator to copy Cho (for fun or to make sure he stays)

Actually strategy is: mulligan for Cho and DS and pray to avoid Silence (1 card), Colliseum and other hard removals. To have more chances try to spam with spells, so city will have 10 cards. Best mulligan is 2 DS + Cho.
Don't use your own silences (except minions, ofc) and removals like SW:D.
And pray to rng god. There are too many ways to break your plan.

Everytime i do more than 100 000 damage to the city it gets destroyed. So how is yours still up? 

You have to wait until your minion has 1 billion+ health, then use inner fire and attack. Otherwise he will concede. So do not attack until you are ready.

Thanks. You have to try out Djinni ;)  Works fine together with Cho