Knights Base

Each time you return from the Lighthouse, you'll want to visit here. You can report to Lord Klaus any new items you've discovered in your adventures. He will provide Medals as a reward for new discoveries, which can be in turn exchanged for improving your Healing of Blood.

Medals
Medals are rewarded based on the Rarity of the item found:

Healing of Blood
You can exchange Medals to improve your Healing of Blood skill in the following ways:
 * 1) Increase the number of uses of healing: This number dictates the number of times you can restore a party member's health with the Healing of Blood ability before heading back to town. It starts at 10 medals for 1 additional use, then 15, then 20... then later starts to count in increments of 10 for each additional use (60, 70, 80...) and so on.
 * 2) Increase the HP restoration capacity: At first, your Healing of Blood will only be able to heal ??? HP. You can choose this option so that each Healing of Blood incantation will restore more HP. It starts at 5 medals for 5 additional HP, then after a few of those moves onto 10 medals for 10 additional HP, and so on (from 510, 15 medals for 15 additional HP).

Resetting the Medals
After going through the "Abyss" shortcut, you can "Resetting your Medals". It means you can reset all used medals, and re-increase Healing of Blood again (num/cap). All knights who have already changed classes will revert to their starting class (keep levels).