Aspect of the king of time

 You manifest the aspect of Cronus king of time

 Cronus king of time, Hp 800 ac 20 immune to critical hits 

Immune to bludgeoning, slashing and piercing damage from nonmagical attacks 

 weapons The sickle of time 20 ft reach +10  to hit 10d10 force damage on hit target must succeed con saving throw dc 20 or be frozen in time can re roll save at the end of you next turn if target has already taken damage you do double damage and have advantage

While aspect of the King of time is active when one of your allies die or fall unconscious you can reverse time and revive them, you can do there attacks per attack action and if a enemy in range does damage to a target you can see you can use you reaction to attack them.