Secrets of the Celestial Weapon is a Dota 2 item of Mythical rarity. On DotaLoot you can win it in free giveaways or earn it with Battle Pass levels.
You can get Secrets of the Celestial Weapon for free in daily DotaLoot giveaways or with Battle Pass levels. The fastest way is opening cases — noticeably cheaper than buying it on the market.