You can mix the cards from the main deck with the ones from the extra deck but the best value/money is this one.
I am using this deck and in many matches I can end my turn with: Apollousa x4 , Chenqying , naturia beast, naturia barkion , granite and 2 hand traps which is instant admit for the enemy :)
The main goal is to summon rock monster with an adamancipator-> summon raptite-> use 2 lvl 4 monsters for granite to get Researcher/seeker and then fill the board depending the enemy. If you get rocksies/dropsies you can do the combo to get the links and then get a free apollousa
The extra deck is filled with specific monsters for every occasion, so it's up to you.