After Golem, the Abyssal Crystal Shrimp drops one of the five abyss weapons and Crystal Shrimp Shells. All five are Lime. You can craft the rest at a Mythril Anvil.

With Calamity loaded, the recipes use Lumenyl, Depth Cells, and Voidstone. Without it they use Chlorophyte Bars, Shark Fins, and matching souls. Tide Reaper’s no-Calamity recipe uses Souls of Fright, not Souls of Might.

Craft without Calamity (Mythril Anvil)

Weapon	Crystal Shrimp Shells	Rest
Abyssrend	8	12 Chlorophyte Bars, 8 Shark Fins, 8 Souls of Might
Tide Reaper	8	12 Chlorophyte Bars, 7 Shark Fins, 8 Souls of Fright
Undertow	8	12 Chlorophyte Bars, 8 Shark Fins, 8 Souls of Might
Deepclaw	8	10 Chlorophyte Bars, 6 Shark Fins, 10 Souls of Night
Everdeep	8	1 Water Bolt, 8 Ectoplasm, 12 Souls of Night

The five

Weapon	Class	First use
Abyssrend	Melee	Left click tears undercurrents; right click slams with a drag
Tide Reaper	Melee	Boomerang scythe; right click pins a vortex
Everdeep	Magic	Rings that curl back; full stacks raise a maelstrom
Undertow	Ranged	Abyssal spines; right click charges a heavy spine
Deepclaw	Summon	Lobster minion; every third snap cavitates

Hits apply abyssal pressure, which slows enemies a lot.

Deepcrystal Armor

See Deepcrystal Armor. Four class helmets share one chest and one legs. The set deepens incoming damage in exchange for class damage and bubble detonation. Pieces: Warhelm, Visor, Crown, Feelers, Breastplate, Greaves.