You will need...:

• water
• sea salt
• pothinir grass

1. ingredient water (x1)
2. ingredient sea salt (x1)
3. ingredient pothinir grass (x1)
4. boil (x1)
5. seal (x1)

Purchase tincture of pothinir at the following player shops:

• Kaldonis's Smuggling Emporium - 500 - River's Rest

Lalan says:
This recipe does not work for tough reps at 24 Ranks and likely stops at 19.

Specie says:
No longer getting reps at 23 ranks.

Berrigan says:
Works till 22, not at 23 as Specie said.