Minikeeper Ra

Combo turn:

• play Glinda Crowskin
• repeat Mogu Cultist until the board is full
• kill off Glinda using one of the 1-mana spells
• play last Cultist
• copy Highkeeper Ra using Faceless Manipulator

You need 10 mana for the combo, but you can use Brann Bronzebeard + Doomkin to get there more quickly while simultaneously slowing down your opponent. Maybe it's even worth adding Raise Dead to get more copies of Doomkin.