For each Equip Card equipped to this card, it gains 1 additional attack during each Battle Phase.
Rulings
Individual Card FAQs
The attacks of "Armed Samurai Ben Kei" do not have to be in a row.
If you equip "Twin Swords of Flashing Light – Tryce" to "Armed Samurai Ben Kei", it can only attack twice, not three times (unless equipped with more cards).
Even if "Armed Samurai Ben Kei" is equipped, attacks twice, and you use "Tailor of the Fickle" to move its Equip Card to another monster, and then use "Collected Power" to move it back, "Armed Samurai Ben Kei" has already attacked twice and gets no additional attacks.
The effect of "Armed Samurai Ben Kei" is a Continuous Effect that cannot be chained to.
DARK|
Level 4|[ Warrior / Effect ]
ATK 500|
DEF 800