User blog comment:Dinosel/One Piece Discussion/Theory! Shanks vs Mihawk!/@comment-203.190.41.37-20160723185155/@comment-203.190.41.37-20160724102608

how bout this   http://z.mfcdn.net/store/manga/106/45-434.0/compressed/h009.jpg

on that image, shanks has 2 sword in the past.

and when he lost his arm, he lost some skill and finisher moves that can not be preformed by only 1 sword.