Ioun Stone Ruby Prism

Melee attack damage inflicted upon the wearer is reduced by 1 point per attack. This item affects melee attacks, it does not mitigate wholly magical attacks, ranged attacks, nor “attacks” made outside of combat.

If a melee attack deals both physical damage and has a secondary effect (e.g., paralysis, sleep, Poison, ennui), as long as all of the physical damage was negated, this ioun stone will negate both the physical damage and secondary effect(s). However, if even 1 HP of damage is not negated, the secondary effect(s) will affect the user.