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I also am considering putting either Valkyrie Harbinger or Kalonian Hydra into this deck, but I do not wish for this deck to be too similar to any of my other decks, so I would prefer to avoid putting those cards into this deck, if I can avoid doing so, and I also am not yet certain about Doubling Season, staff of completion, or Selvala, Explorer Returned, since those cards would be awesome in this deck, but I do not wish to use them in every deck in which they would be a good addition
Do you keep targeting the same player with it, or spread the love around the table
Some of these are problematic with the fundamentals of the format, like Karakass ability to shut off any commander at virtually no cost, or the way Trade Secrets lets you collude with an opponent to each virtually draw your deck
Sacrifice a creature whose value has already been used up, like Arboreal Grazer, Burning-Tree Emissary or Reclamation Sage