Curios

Dropped by Wandering Wight (Forest of Wolves > Outside the Forest). Missable: beat him before ringing the 3rd bell; he disappears at the 3rd bell, which teleports you straight to Elder Jinchi (available again in New Game+).

Small chest on a table in the Black Wind King courtyard, Black Wind Cave > Cave Interior.

Sold at Chapter 1 Keeper's Shrines for 2,400 Will (one per cycle), once Chapter 2 is reached or finished (guides differ).

Chest after defeating Red Loong (waterfall at Forest of Wolves > Outside the Forest), needs the Loong Scales from Chapter 2.

Chest next to a stele in the cave past Tiger's Acolyte's bridge, Yellow Wind Formation > Windrest Hamlet.

Sold by Man-in-Stone for 12,800 Will after his questline.

Chest after defeating Black Loong (Fright Cliff, Four Loongs questline).

Dropped by the secret "Tiger Vanguard" in the Kingdom of Sahali (Chapter 2 secret area).

Random drop (about 2.4%) from Frozen Corpse enemies in Chapter 3 (e.g. near Snowhill Path > Mirrormere).

Kill all 9 Lantern Wardens of the Pagoda Realm prison (visible only during the red-eye effect) before defeating Captain Wise-Voice; missable for the cycle.

Small golden chest under the stairs at the end of the lower prison, Pagoda Realm > Lower Pagoda.

Dropped by Captain Lotus-Vision (below Pagoda Realm > Upper Pagoda).

Since patch 1.0.8: small box on the left of the path up from Valley of Ecstasy > Mindfulness Cliff (corridor after the first Non-White fight). Before 1.0.8 it dropped from Non-Able.

Guaranteed drop from a specific Charface giant (焦面鬼王) on Valley of Ecstasy > Longevity Road (left path, corner of the area).

Random drop (about 3.6%) from Wolf Guardian enemies (e.g. Valley of Ecstasy > Forest of Felicity / Longevity Road).

Random drop (about 3.6%) from Dual-Blade Monks (e.g. Valley of Ecstasy > Towers of Karma).

Chest in the second hall up ahead from New Thunderclap Temple > Temple Entrance.

Fox questline (Chapter 3): after Non-Void, return to the quest spot from Valley of Ecstasy > Forest of Felicity shrine; the key item Snow Fox Brush becomes the curio.

Dropped by Yellow Loong (Chapter 4) after the earlier Loong fights.

Obtained by defeating Zhu Bajie in the second fight, in the mud pit next to the Hut of Immortality shrine, before the Purifying Spring shrine (Chapter 4).

Chest behind Commander Beetle, Temple of Yellow Flowers > Forest of Ferocity.

Box on the offering table at Violet Spider's grave near the Purple Cloud Mountain mural, available after Hundred-Eyed Daoist Master.

Coffin chest up the hill from Purple Cloud Mountain > Valley of Blooms.

The large chest seen after dropping into the hole following the Second Sister fight (Webbed Hollow upper area).

Small box under a pavilion guarded by a Daoist, near the Petalfall Hamlet shrine, between Bounds of Deity's Abode and Petalfall Hamlet (Purple Cloud Mountain).

Random drop (about 3.6%) from Snake Sheriff (e.g. pond near Temple of Yellow Flowers > Court of Illumination).

Random drop (about 1%) from destructible ground cocoons in the Webbed Hollow.

Random drop (about 3.6%) from Worm Practitioners (虫羽士), e.g. resting ones near the Temple of Yellow Flowers meditation spot.

Dropped by the two shield giants (Sea Rakshasa) between Rakshasa Palace and The Emerald Hall, once defeated.

Dropped by the Rusty-Gold Cart after destroying the Five Element Carts (Pale-Axe Stalwart questline), Field of Fire > Cooling Slope.

Reward for defeating Bishui Golden-Eyed Beast (Bishui Cave secret area).

Chest at the end of the cave branch past Woods of Ember > Height of Ember (towards the Five Element Carts).

Random drop (about 3.6%) from bull guards (牛侍长 / 牛校卫 / 牛力士) around Rakshasa Palace.

Random drop from Thunder Elder (1%, Chapter 3) or Fire Elder (3.6%, Chapter 5) monks.

Dropped by Jiao-Loong of Waves (Mount Huaguo) after unlocking cloud flight.

Dropped by the frog chief Lang-Baw-Baw (Mount Huaguo).

Reward for clearing the Gauntlet of Legends challenge "Three Tigers" (三虎).

Reward for clearing the Gauntlet of Legends challenge "The Valiant Six" (六健将).

Reward for clearing the Gauntlet of Legends challenge "Monkey Mind" (心猿).