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Going to a Blizzard Worldwide Invitational also allows players of Blizzard 's games exclusive in-game extras , including the Tyrael 's Hilt non-combat pet for World of Warcraft .
 Blizzard, Blizzard
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Blizzard, Blizzard