At 4th level, when the Frenzied Berserker is under the effects of Frenzy, he/she has the effects of the 4th level Cleric spell Death Ward. For the duration of the Frenzy, the Frenzied Berserker is immune to any Energy Drain, Negative Energy Damage, Ability Decreasing Effects or Death Spells, Spell-like Abilities, and Effects. This bonus is in additon to all benefits and penalties granted by Frenzy itself.