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However , the bottom-most layers of bedrock were affected by the explosion of the great planet 's fissionable core and underwent a slow but steady chain reaction , turning into green Kryptonite .
 Kryptonite
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kryptonite