Helmet of Fate

The Helmet of Fate is an ancient, and extremely powerful magical object. It was created by the Lord of Order Nabu along with two other mystical items: the Amulet of Anubis and the Cloak of Destiny. The three items combined would grant the wearer the power of Doctor Fate.

Passive
Fate: This artifact is required for the properties of the Amulet of Anubis and the Cloak of Destiny to work. When combined, the user has an Armor Class of 18.

Power Immune: The artifact is immune to all effects and powers not cast by the wielder. This doesn't extend immunity to the wielder. It cannot be broken, transported (seperately from the wielder), or altered by an opponent.

Last Laugh: The artifact allows the wielder to automatically succeed on death saves and gain 10 health points once per day. You gain this ability again after completing a long rest.

Active
Reverse Time: Out of combat, the individual may go back to two days in the past without incurring any penalty. If it tries to go back further, it must make a Wisdom save to not take (additional days) * d10 in Force Damage. Any action that would cause the caster's future to not exist (dying in the past, killing an integral NPC) will cause a Time Break. Roll a 1d100. On 10 or below, the individual will die and time will revert to normal. On 11 to 40, the spell will fail and the user will take 5d20 Force Damage. On a 41 or above, the game resumes normally. During combat, the individual may return up to the beginning of the encounter. They must complete a long rest before activating this ability again.