Amulet of Martyrs

This glowing red amulet pulses with life. It seems to leech directly to your soul when you attune to it.
The energy within seems... Unstable, almost as if it might burst at any moment.

While attuned to this artifact, you gain disadvantage on death saving throws.
When you drop to 0 HP, and fail all death saves, your body explodes in a whirlwind of energy as the amulet converts every fiber of your being and soul into pure power.
You deal your remaining Hit Dice worth of force damage to all creatures in a radius equal to five times your proficiency bonus. Any creatures killed in this explosion cannot be revived.

There will be no trace of your body left. You cannot be revived in any way, nor can your soul be recalled.

Notes: Damage: Force