Mardu Hordechief could be one of the cards that are tapped and attacking along with Winota
8 Duke Ulder Ravengard Myriad And Aggro - Name A Better Pair There's a long-running joke that every red-white deck in Commander is an aggro deck without deviation

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Between Karn, Walking Ballista, and Heart of Kiran, an absurd number of decks are running colorless cards, and Ceremonious Rejection might actually be maindeckable
This is compounded by blue having an abundance of three drop creatures
Like I said earlier, the initial investment in these secondary cards isnt that high, which covers some of the risk involved, but just keep in mind that it may not always be the case