Board Thread:Episode Discussions/@comment-1181222-20171011112920/@comment-27797856-20171012071334

General Heed wrote: Also why did Suigetsu give back the Executioner's Blade <...> Urghhhhhh..

He didn't.

Suigetsu lost the sword while in the Land of Iron. At some point, Kabuto got his hands on it, gave it to Edo Zabuza who later lost it to Kakashi.

Seriously dudes, watch the episodes with a little more attention...