Ring of life protection
|This blessed ring protects the life-force of its wearer from negative energy, making them partially immune to the draining effects of undead and necromantic magic.|
Whether this ring is useful or not is largely situational, although life protection is decidedly less useful than fire or cold resistance. As all draining attacks are subject to EV, very agile characters will not generally need much negative energy resistance. However, high-AC, low-EV characters taking on the shadow dragon-heavy Vault:5 will usually want at least two levels of life protection, since they can otherwise expect to lose significant amounts of experience in each encounter.