What triggers resurrections on the Battlefield?

Twice now I have lost close PVP battles where I had edged ahead only to lose when a key enemy was resurrected with full cooldown in its abilities.

How does it work? Why does this need to be in the game?

The cleric’s bone club can give resurrect to a character. It helps to try and not kill the “Death Ward”ed character until it expires


Cleric Epic Weapon gives has a chance to apply the Death Ward buff when he attacks, and you can see Death Ward buff on the character.

The Barbarian Legendary item also gives him a passive chance to resurrect, but it is only 10 or 20%.