Topdeck the Halls Topdeck the Halls has aged beautifully due to the Booster Fun initiative that has resulted in a dizzying number of alternate frames and printings and art and promos I doubt youd struggle much to build an entire EDH deck with cards that you can miracle off this
With Phyrexian Altar, a Changeling like Changeling Outcast, and Cloudstone Curio, you can loop it in and out of the graveyard for infinite enters and dies triggers
The best way to use Plum is to ignore the attack clause altogether, creating Treasure tokens through other means, and filtering the mana from those Treasures into spells
Similarly, they might have to forgo countering anything so that they can play their creatures
Just watch out for certain Exile spells like Swords to Plowshares or Vraskas Contempt that would make recasting Optimus more expensive (the Commander tax applies to both sides), or other annoying blue cards like Capture Sphere that doesnt kill him but does prevent attacking and blocking