Ring of Vitality

Ring of Poison Resistance, basically.

The Kraanan spell Resist Poison doesn't cut it, because it can be
removed by Purge. This ring cannot be dealt with so easily, and resists
75% of the vigor drain of poison application itself and 75% of the
actual poison damage dealt each tick.

This is an "adding something new" solution to the extremely overpowered
Dusk Rat / Illusionary Form poison. Bonus, it will also help against
spiders, poison fogs, and any other types of poison.