I like to see an item that could be make or break.

Its an item, how its obtained isnt my concern but it is useful or infuriating and annoying.

The Second Coming
It has 50/50 fail rate.
When you take fatal damage it could save you from dieing but it comes as a cost.
It uses 10% of all items durability and 100% of the energy you have at the moment if activation. It has a long cool down so can only be used once per boss ect. If it fails, you get a vulnerability auta and you take extra damage.

so i can make people lose 10% dura and then kill them again? nice