Keep it in a cool, dry place
Krenko, Tin Street KingpinKrenko, Tin Street Kingpin may be the less popular of the two Krenkostwo Krenkos, but in this case his +1/+1 counter synergy makes him by far the preferred option
Note that if you use Nashi as a Commander, you cannot ninjutsu it from your Command Zone so that won't work unless you find a way to put it into your hand
What other cards or decks do you want this against
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One particularly useful strategy is to use the Trap Card "Dark World Brainwashing" in which if an opponent activates an effect and you have at least 3 cards or more in your hand, you can target a Dark World monster on the field, return it to the hand and the opponent's monster effect changes to "Your opponent randomly discards one card"