Adds +1 to Dexterity (thus, depending on prior Dexterity score, either 0/+1 To Hit with ranged attacks, either 0/+1 to AC, and either 0/+1 to Reflex saving throws) and -3 to Will saves
Drawback
Adds +2 to Strength (thus adding +1 To Hit in melee and +1 Damage with melee and thrown weapons) and -1 to AC
Adds +1 to Fortitude saving throws but user may not equip any other ioun stone
Adds +2 to Dexterity (thus adding +1 To Hit with ranged attacks, +1 to AC, and +1 to Reflex saving throws) and -1 to AC
Adds +1 to Constitution (thus, depending on prior Constitution score, either 0/+1 to Fortitude saving throws and either 0/+1 to max HP per character level) and -1 to AC
Adds +1 to Dexterity and -1 to AC (thus, depending on prior Dexterity score, either 0/+1 To Hit with ranged attacks and either 0/+1 to Reflex saving throws–any potential AC bonus is negated by this item’s AC penalty)
Adds +1 to Strength (thus, depending on prior Strength score, adding either 0/+1 To Hit in melee and either 0/+1 Damage with melee and thrown weapons) and -1 to AC
Adds +2 to Constitution (thus adding +1 to Fortitude saving throws and +1 to max HP per character level) and –1 to AC
Adds +6 to Strength (thus adding +3 To Hit in melee and +3 Damage with melee and thrown weapons), -4 to Dexterity (thus suffering -2 To Hit with ranged attacks, -2 to AC, and -2 to Reflex saving throws), and -4 to Constitution (thus suffering -2 to Fortitude saving throws and -2 to max HP per character level)
Adds +6 to Dexterity (thus +3 To Hit with ranged attacks, +3 to AC, and +3 to Reflex saving throws), -2 to Strength (thus suffering a -1 To Hit in melee and -1 Damage with melee and thrown weapons), and -2 to Constitution (thus suffering -1 to Fortitude saving throws and -1 to max HP per character level)