Guild Wars 2 on Twitter: "Catch up on story, brush up your Masteries, and prepare for The #IcebroodSaga with the Expansion Boost Special Event! From today until September 17, you'll gain double
LPT: If you're looking for fast Experience gain for Skyscale masteries (or Karma), Specimen Chamber pre-event is a good choice : r/Guildwars2
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Experience - Guild Wars 2 Wiki (GW2W)
Blizzard Adds Development Note about "Adventure Awaits" Buff on Season of Mastery - Wowhead News
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BDO 2019 Manos Mastery Quick Reference Black Desert Online