Trench Octopus Card card_deep_trench_2

What it is for

Card: fits into Left hand gear that has a free slot.

Damage taken from Fish −33%.

Weighs 2 of your carry capacity — and weight is what stops drops once the bag fills up.

The best source is Trench Octopus, at 0.050% per kill. You can farm it at Deep Trench.