As its name suggests, Squid Ink is harvested by the Giant Squid that resides in Neverland, said only to be able to be obtained by either a mermaid or Rumplestiltskin. It has the ability to magically freeze anyone who comes into contact with it for a while. It can also be used to disintegrate things as strong as metal, and can be used to trigger memories under the Dark Curse.
- Rumplestiltskin wrote Emma's name on a piece of parchment using Squid Ink repeatedly, so that his memories would return to him in Storybrooke when he heard Emma's name.
- It is possible that Cora's spellbook is written in Squid Ink.
- S1, E04: "The Price of Gold" (flashback)
- S2, E09: "Queen of Hearts"
- S3, E04: "Nasty Habits"
- S4, E15: "Poor Unfortunate Soul" (flashback)
- S5, E08: "Birth"
- S5, E10: "Broken Heart"
- S6, E09: "Changelings" (flashback)
- S7, E21: "Homecoming"