Details: Heroic Duels – 5507 MMR
Passives: Crystal Gem & Totem of The Dead

Totem of The Dead > Mummy Magic every time, it greatly enhances the potency of your hero power + paired with a passive like Crystal Gem will give you overwhelming tempo. Always try to keep the 2 mana 3 mana deathrattles or keep some discover cards to get them.