Mulligans
This is a control deck that aims to mange the opponent’s board and then overwhelm them with big upgraded mechs (Mechano-Egg, Damaged Stegotron) and a resulting Kangor's Endless Army.
Early game: Righteous Protector and Tar Creeper are good for trading with the opponent. Crystology is useful for drawing them. Doomsayer, Wild Pyromancer, Equality, and Consecration are good for clearing their board. If necessary, Annoy-o-Module can be played, but is ideally used as a buff. Truesilver Champion is good for clearing minions.
Mid game: Once the board is stabilized start playing high value cards such as Val'anyr, Mechano-Egg, and Damaged Stegotron. Continue to buff the mechs when possible with Annoy-o-Module, Wargear, and Zilliax.
Late game: Play Kangor's Endless Army as a potential win condition. Use Tirion Fordring and Uther of the Ebon Blade for additional value.
Utility: Crystalsmith Kangor can be combined with Holy Light, Lay on Hands, and Uther of the Ebon Blade for healing. Shrink Ray and Sunkeeper Tarim will both stabilize the board and also give you a way to activate Mechano-Egg.