If there are no other creatures in play, do I have to return Double Header to my hand
Players get that they are not going to see every card every game
If you can trigger Tax Collector's enter the battlefield effect multiple times with a card like Essence Flux or Ephemerate, you can essentially make it near impossible for the opponent to cast a spell on their next turn
This article explores pregame actions, Leylines, Chancellors, companions, conspiracies, Serum Powder mulligans, Gemstone Cavern, Flash Hulk history, and other strange cards that affect the game before anyone plays a land
They're not all red either, I promise, the colorless card, Chalice of Life / Chalice of Death is a clean win condition if your opponent's creatures can't attack
I personally like the idea of pairing up with Sarah Jane Smith and leaning into Clue tokens, since you can generate them to grow the Doctor large, and then post-combat you can sacrifice one or two to draw some more action