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One of the primary qualities of the Ninja is
the ability to stay low key. Despite possessing
a set of superb skills that can be unleashed at
a moment's notice, they wisely realize that alertly
chilling is generally the most effective way to
operate. When the opening they await presents
itself, they deftly seize the opportunity to strike
with focus and composure. So, when someone tells
you to "put on your Ninja cap", maybe this is what
they mean.
We are 90% sure