Unquenchable Flame of Life

(Libris Mortis: The Book of the Dead, page 31, DnD 3.5)

[General]

You are hardened to the attacks of the undead.

Benefit

You gain a +2 bonus on all saves against the extraordinary or supernatural abilities of undead creatures.

Special

If you have selected undead as your favored enemy, your bonus on saving throws is instead equal to your favored enemy bonus against undead.