Even the last attacks Sam landed with the staff are not that great. They are quite simple actually. The only problem is them being lightning attacks and Wind Fiend is too stupid to prepare any defense.
He is the epitome of the saying 'People judge others by their own standards.' He doesn't have the ability to move like Sam and hit like Sam, so he just decided that Sam wouldn't be able to do that too.
Sam was clearly too disappointed. When the lightning user looked at the situation, he decisively halted the battle and yelled a command to the troops before crushing the shadow token.
The troops started to retreat and the Nagin castle troops started their pursuit as they didn't want to lose this chance.