Pale Green Ioun Stone

Pale Green Ioun Stone is an ioun stone which gives the wearer 10% more max hit points and it lowers THACo with -1. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition. This item is dropped by Pai'Na in the dungeon underneath Athkatla Graveyard.

In-game description
"On his deathbed, aged hero Rigar TrueBlood begged one last request of his mage companion Spectorial: that his skill and fortitude as a warrior live on. The reluctant friend consented and transferred these traits to an item, knowing the warrior's soul would then be lacking them. This pale green Ioun stone now holds these essences, and grants the owner TrueBlood's health and skill."