Ink Sac

An ink sac is an item dropped by a squid upon death used to create black dye, dark prismarine and book and quill.

Squid
A squid drops one to three ink sacs upon death. The maximum amount is increased by 1 per level of Looting, for a maximum of 1 to 6 with Looting III.

Fishing
Ink sacs can be obtained as a "junk" item from fishing. The Luck of the Sea enchantment decreases the chance.

Compound creation
Ink sacs can be created from its base elements, using the compound creator.

Trading
Wandering traders sometimes sell 3 ink sacs for an emerald.

Crafting ingredient
$$, ink sacs can be also used in banner patterns:

Dye

 * Each type of dark prismarine can be crafted using varying amounts of 8 prismarine shards.

Trading
Journeyman-level librarian villagers have a $2/3$ chance to buy five ink sacs for an emerald. They always offer the trade $$.

Signs
Ink sacs can be applied to signs to revert glowing text back to default.

ID