This paragraph uses rules from Implement Materials section found on page 99 of Realms of Terrinoth.
Underneath the surface of the sea, life flourishes as much as on land, and nowhere is it more diverse as in coral reefs. The reefs themselves are formed from colonies of small creatures that are held together with "coral skeleton", which is usually just called coral. Corals can have different colors: red, pink, white, blue, and even black -- and are often valued as much as precious gems. Being the basis of such thriving ecosystems corals amplify healing and protection magic.
When your character casts a Heal or Barrier spell using a coral implement, you may add :success: to the results.