Even with four or five creatures, thats devastating
That makes cards such as the Takahiro Ikeda Neo Summer Battle Road National No

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Depending on the circumstances, thats effectively a boardwipe
The good thing about all those Equipment cards is that theyre also strong choices to just put onto Marisi, leveraging its ability to make people attack someone other than you
Its also just difficult to interact with it completely dodges creature removal, and you cant Counterspell the ninjutsu ability, so the very moment you decide not to block a creature, Kaito, Bane of Nightmares hits the table, and its sticking around at least long enough to use a loyalty ability and pass the turn