2 {composite Golem}
1 {Door to nothingness}
I'm tired. You all can figure out how to get the mana
A deck of Myrs and things that let you untap Myrs (the ones that give you mana) and then only sorceries being primal surge. Hit primal surge and play every card in your deck (til the next surge) then use artefact untappers and all the myr to use the door
The flavor text on the fifth dawn door to nothingness is so sad.