Defeating Erazor Djjin.
To defeat Erazor Djjin in the second to last mission, you have to run towards him and get as many silver rings as you can. Wait for him to attack when he goes to the left (your left) and strikes down then swipes it through your legs. Instead jump before he swipes his weapon under your feet. This will give you the chance to attack him three times. When he chllenges you to a duel, charge your jump and wait for him to get to the middle then jump and attack.
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