As no Ocean Biomes generate on the map currently the only way to get ink sacks is fishing.
But this is not documented and it's only a very rare drop.
So to make this process a bit less grindy I propose a crafting recipe for ink:
Any sword (even damaged) can be used but they will take 10 damge per crafted ink sack so vanilla swords will be consumed.
As no Ocean Biomes generate on the map currently the only way to get ink sacks is fishing.
But this is not documented and it's only a very rare drop.
So to make this process a bit less grindy I propose a crafting recipe for ink:
Any sword (even damaged) can be used but they will take 10 damge per crafted ink sack so vanilla swords will be consumed.