{Master of Waves} & {Progenitor Mimic}
Turn by turn the board floods with more and more elementals, an they all get a +1/+1 pump.
To make a deck add cheap mana ramp and control, I like the blue half of {Turn // Burn} for surprise god smackdown and {Cyclonic Rift} for board control.
How about {master biomancer} with {master of waves}