Mulligans
General Mulligans
You are aiming to have board control towards the beginning so that you can rely on your bigger minions to not immediately die when they are put onto the board.
Aggro Mulligans
If your opponent is playing agro, you want to get cards out quickly. Want to be able to remove their cards and heal.
Control Mulligans
If you think your opponent might play control, this is a good mulligan. You want to play big minions as fast as you can, as your opponent will not put to much early board pressure.
A controlish type deck with c’thun.