
Book of Specialisation (The Crowbell)
Drops from The Crowbell.
Passive skill mechanic
Weapon Set Passive Skill Points let you allocate different passive nodes for Weapon Set 1 and Weapon Set 2. They do not add the same number of regular passive points. Allocating them requires an equivalent number of unallocated regular passive points.
Collect both rewards in each act and all four Interlude rewards.

Drops from The Crowbell.

Obtained by completing The Lost Lute.

Drops from Kabala, Constrictor Queen.

Obtained by completing Tradition's Toll.

Drops from Mighty Silverfist.

Drops randomly from Vaal Goliaths in Utzaal and Aggorat.

Obtained by completing Dark Mists.

Obtained in Trial of the Ancestors after speaking to Hinekora.

Drops from Oswin, the Dread Warden.

Obtained by defeating The Abominable Yeti then speaking to Hilda.

Obtained by defeating Akthi, the Final Sting and Anundr, the Sandworm then speaking to Risu.

Obtained from The Hooded One at Kingsmarch after completing all three Interlude areas.
This point is separate from the 24 campaign points.

Exclusively obtained through a specific 10-Rune runeword from a Verisium Remnant.