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Equip Gear with Spirit Buffs
Weapons and Armor offer all sorts of handy buffs in PoE2 that can grant you certain skills or effects. If it’s Spirit you’re after, you are going to want to get your hands on a Sceptre. All Sceptres offer a 100 or more boost to Path of exile currency your Spirit, and they are also quite common, making Sceptres the fastest and most reliable way to boost your Spirit.
Other items, such as Armor, can also have a Spirit-boosting stat. This is rarer and much more unreliable, however. Keep your eyes out and use your Scrolls of Wisdom to unlock any particularly good-looking gear, and you might be lucky enough to find something that boosts your Spirit.
Defeat Bosses
You can also seek out and defeat bosses that drop Spirit-boosting consumables. The land is littered with bosses in Path of Exile 2, and some of them drop valuable materials that you can consume to buy POE orbs permanently boost your stats.
The first boss you can find that will boost your Spirit is in Act 1. As you progress through Act 1, you will receive the Ominous Altars quest from Finn. This quest involves you searching the Hunting Grounds for an area called Freythorn.