When an attack roll hits you and its damage includes Bludgeoning, Piercing, or Slashing damage, you can take a Reaction to reduce the attacks total damage against you. The reduction equals 1d10 plus your Dexterity modifier and Monk level.
If you reduce the damage to 0, you can expend 1 Focus Point to redirect some of the attacks force. If you do so, choose a creature you can see within 5 feet of yourself if the attack was a melee attack or a creature you can see within 60 feet of yourself that isnt behind Total Cover if the attack was a ranged attack.
That creature must succeed on a Dexterity saving throw or take damage equal to two rolls of your Martial Arts die plus your Dexterity modifier. The damage is the same type dealt by the attack.
The creature that damaged you is momentarily surrounded by green flames. It makes a Dexterity saving throw, taking 2d10 Fire damage on a failed save or half as much damage on a successful one.
Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 1.