Slasher: 

• Once per turn when you hit a creature with an attack that deals slashing damage, you can reduce the speed of the target by 10 feet until the start of your next turn.
• When you score a critical hit that deals slashing damage to a creature, you grievously wound it. Until the start of your next turn, the target has disadvantage on all attack rolls.

Divine Fury:

While you’re raging, the first creature you hit on each of your turns with a weapon attack takes 1d6 +3 necrotic damage.

Multiattack. This creature can attack twice per round

Greatsword. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 11 (2d6 + 4) slashing damage. When raging, damage increases by +2 per hit; divine fury adds an additional 1d6+3 necrotic damage on the first hit

Handaxe. RangedWeapon Attack: +7 to hit, range 20/60 ft., 1 target. Hit: 7 (1d6 + 4) slashing damage.

Rage. 

As a bonus action enter a rage for up to 1 minute (10 rounds).

You gain advantage on STR checks and saving throws (not attacks), +2 melee damage with STR weapons, resistance to bludgeoning, piercing, slashing damage. You can't cast or concentrate on spells while raging.

Your rage ends early if you are knocked unconscious or if your turn ends and you haven’t attacked a hostile creature since your last turn or taken damage since then. You can also end your rage as a bonus action.

Enter the description for how legendary actions work for your monster here.

Legendary Action Name (Costs # Actions). Enter the description for your legendary action.

Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.