After opening Mecha'thun in a pack yesterday, I remembered an idea I theorycrafted the day it was annouced, so here it is : The Stupidest F2P Mecha'Thun! \o/
The concept is quite simple: you draw, you reduce the cost of your Mecha'thun with your Galvanizers (helped by the Youthful Brewmasters) and when your deck is empty, you play your mecha god, a Wild Pyromancer and an Equality!
The deck works, but if you think that you can improve it, feel free to do so in the comments, I'm all ears :)
Fair warning: This deck is not viable (yet?) for ladder. It was made with the cards I had to be fun and to test a concept.