"The grandaddy of birthday cakes. Processses every other ore at a massive value. MH 2nd Birthday Exotic."
The Grand Birthday Cake is an Exotic-tier furnace released on Miner's Haven's 2nd anniversary on 06/12/2017.
It processes the first ore with a multiplier of x35, then the second ore with a multiplier of x350, and this repeats. Due to this, it can be considered as one of the most powerful furnaces when its smaller multiplier is used up to make way for more valuable ore to be processed with the furnace's higher multiplier.