Mulligans
Explosive Runes I used this Deck to climb into Diamond 10 in wild mode (started from Bronze) with just a single lose vs. an aggro mech Paladin.
This Deck is superfast and almost unstoppable if you use your secrets smart!
f.e. Keep Potion of Polymorph if you play vs. a Warlock and use it on t4 (if you are first) or t3 if he has the coin to render a pesky Voidcaller useless and almost win a game.
Same goes for Kirin Tor Mage. This Mage on t3 is super broke when combo’ed into a Counterspell vs. Mages in general or vs. a Hellfire against Handlock.
You will simply overrun most of Hunters (will struggle vs. Spell Hunter since Explosive Runes is a literally dead card here) so you want either a Hunter match-up, or a Priest. The Priest can not keep up pace if you hit a nice Counterspell.
You will sh*t on almost any Deck except Heavy Ctrl Warriors (I met none in my run).
I suggest teching a Polymorph and mulligan for it if you meet many Res-Priests!
Happy climbing!