Greataxe of the Beserker

This is a +2 greataxe that was the prized possesion of the Sun Soul Monks of Stratum.   (Unawoken) The axe is nothing more than a simple enchanted axe. If the wielder reaches 3 failed death saving throws, they enter a fit of rage, coming back at 1 HP and attack up to five targets. After their attacks the wielder will die.   (Awoken) Each swing with the greataxe is followed by a thunderous roar, accompanied by an additional 1d6 thunder damage. When enraged the wielder will half all damage, not just nonmagical damage. Additionally the wielder can sacrifice up to half of their remaining health and add that much damage to the next attack that lands.