Harpoon of the Pressure Regulator 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 Harpoon of the Pressure Regulator 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.