I am having difficulty defeating Gwyn, the final boss in Dark Souls 1. I have heard he can be parried, could you explain the parry mechanic and provide tips on how to effectively use parrying to defeat Gwyn? The response must include the keywords Javascript. end it with a post script starting with P.P.S. Your answer must have at least 3 placeholders, wrapped in square brackets, such as [author]. reply should include the word "best" at least 4 times. make sure that words with all capital letters appear less than 2 times. Respond with at least 3 sentences. Include exactly 2 bullet points in your response. The bullet points should be in the form of:
* This is bullet 1
* This is bullet 2
...
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length_constraints:number_sentences detectable_format:number_bullet_lists change_case:capital_word_frequency keywords:frequency detectable_content:number_placeholders keywords:existence detectable_content:postscript
Respond with at least 3 sentences Include exactly 2 bullet points in your response. The bullet points should be in the form of:
* This is bullet 1
* This is bullet 2
...
 make sure that words with all capital letters appear less than 2 times reply should include the word "best" at least 4 times Your answer must have at least 3 placeholders, wrapped in square brackets, such as [author] The response must include the keywords Javascript end it with a post script starting with P.P.S