See the full deck list and guide here: http://hearthwatch.com/mage-deck-firestorm-3-0/

FireStorm 3.0 is a Mage Mid-Range Deck that was invented back in Season 15 and has remained strong in the meta ever since. MarineKing reached top 100 legend (on NA server) and subsequently reached legend many times using this deck on various severs and seasons since then.