Hearthpwn

MarkMcKz has a deck with the same win condition - end game combo is three cards, being discounted Mecha'thun and Skaterbot magnetized, Subdue the rushed Mecha'thun, and run it into an opponent's minion. This version is optimized to reach the endgame - using healing and board clears to deal with the early/midgame all while using the insane draw engine that Paladin has. The goal is to save the 2x Time Out until the very end if possible. You will occasionally run into hand size issues as this is a heavy cycle deck. Most people don't expect to see Nozari either, she can easily be replaced by Crystalsmith Kangor. I use Nozari because that's the legendary that I have, and is a bigger body that threatens the board as you try to keep your opponent from punching you in the face.

The ideal mulligan is Crystology, and any of the minions that cycle more cards. Push Galvanizers out when you have Skaterbot and Mecha'thun in hand. Use targeted draws (Crystology, Salthet's Pride) to gain more cycle, use general cycle cards/minions to dig for board clears. Once you have the combo, use as many cards as you can if there isn't a board to worry about. Most people are not running combo disruptors right now, since the meta is more focused on midrange - if you can weather the assault, this can win some games on ladder.