Erethdor's grimoire

Erethdor's grimoire is an item unlocked by consuming tradeable token version dropped by Solak.

It restores 37% of the player's total prayer points over a 30 second period(tooltip is bugged for the duration as well), with a five minute cooldown. This gives a total of 375 prayer points per activation at level 99 Prayer - 4,500 prayer points per hour with perfect activation timing. For comparison, a 6-dose super prayer flask contains 2,496 prayer points.