Tavern Brawl Week Twelve is, It’s Raining Mana! Here’s the official description:
Dalaran floats overhead, it’s soaking your deck with mana! On your first turn you get 1 like normal, but then you get 3, then 5, then 7, etc.
Rewards
You receive one Classic Pack for your first victory!
Does win count add to reward?
No, wins are only for bragging rights/personal bests. [Source]
Scenario
Choose a class, and create your own deck. Your mana progression is totally different so you’llĀ have to build your deck with a much higher curve. You’ll want to make a deck that combines low cost removal with high value minions.