This is the Neviilz Summoning Stone Old Gods Mage Deck he’s used to climb on ladder.
Summoning Stone – ‘Whenever you cast a spell, summon a random minion of the same cost’.
The aim of this deck is to get the summoning stone on the board and start casting spells. The value you get from the random minions can be insane and will turn a game in your favor with a little RNG!
This C’Thun Warrior Deck List Legend Rank is the best build currently to counter the META. It has enough early game to navigate through aggro decks, while control decks just can’t outlast this deck with all the armor synergy.
Elise Starseeker gives you a late game option to swap all your cards for legendaries after you have used C’Thun. In the mirror match, or against other C’Thun’s save Sylvannas for when they drop their C’Thun. This gives you the chance to steal theirs and causing them some serious problems.