Ring of the Siren's Kiss

Adds +1 to AC and the wearer is immune to being Hindered while underwater.

This ring does not confer the ability to do any of the following while underwater: breathe, cast Spells, read (cast) scrolls, speak, use magic items that require a command word (e.g., wands)

Hindered: When underwater, creatures not native to water (including player characters) are very slow to propel themselves. In melee combat, only characters with Free Movement may attack the first round. In addition, without magical aid anything requiring movement or a Move Action is not possible during the first round of combat.