With a Maze of Ith or Spires of Orazca (the other side of Thaumatic Compass), you can ensure your opponents wont attack you with more than one creature a turn
Most notably, this card is a great card answer to Urzas Saga, one of the best cards in Modern and Legacy
This feels like a Copy my homework, but dont make it too obvious situation, but at least it gives energy players more tools to work with
Silver Erne is apparently big or vicious enough to also have Trample
If white is only a splash color, I would also expect the land selection to be mostly or entirely blue ideally you can get all your white mana from two-color lands like Hallowed Fountain, so you dont need to play any white-mana-only sources that cant cast the majority of your spells
Pot of Desires X SPELL Banish 10 cards from the top of your Deck, face-down