AmbersIndestructible Shell, Life Diverted and Wound that Heals
Deep Water is a Lantern in Cursed Hollow, a region that opens in main quest chapter 6, PUNISHMENT. An altar about 200 m away in a straight line gives the Claymore as its reward. Silent Cannons is the closest other Lantern at about 160 m, with Eerie View at about 180 m and Village Church farther off at about 900 m.
The chests nearest Deep Water hold 3 Pure Blade Material, 2 Distilled Blade Material, a Distilled Transmutation Material, an Empty Ferrofluid Flask and a Ferrofluid Flask Power Upgrade, along with the Ambers Indestructible Shell and Life Diverted. A third Amber, Wound that Heals, is also close by. 1 of the nearby chests is trapped, so approach chests here with care. Loose pickups include 8 Pistol Ammunition, 6 Legendary Catalyst Clots, 5 Nephtoglobin Vials, 4 Mythic Catalyst Clots, 3 Standard Firearm Parts, 2 Superior Firearm Parts, a Stasis Whetstone and Sands of Time. Look out for 2 notes as well, Headman's Daughter's Prayer and a Letter.
Claymore
Pure Blade Material
Distilled Blade Material
Distilled Transmutation Material
Empty Ferrofluid Flask
Ferrofluid Flask Power Upgrade
Indestructible Shell
Life Diverted
Superior Firearm Parts
Pistol Ammunition
Legendary Catalyst Clot
Nephtoglobin Vial
Mythic Catalyst Clot
Standard Firearm Parts
Cleansing Vial
Crude Blade Material
Fire-Clad Rounds
Hand Grenade
Refreshing Vial
Sands of Time
Special Cartridges
Stasis Whetstone
Stasis-Clad Rounds
Whetstone
Silent Cannons
Eerie View
Village Church