Masked Killer

Medium humanoid (any race), chaotic evil

Armor Class

15 (studded leather)

Hit Points

97 (13d8+39)

Speed

30 ft.

Saves

Con +6, Wis +5

Skills

Athletics +7, Intimidation +5, Perception +5, Stealth +6

Languages

any two languages

Challenge

5

Aggressive

As a bonus action, the killer can move up to its speed toward a hostile creature that it can see.

Ambusher

The killer has advantage on attack rolls against any creature it has surprised.

Relentless (Recharges after a Short or Long Rest)

If the killer takes 20 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead,

Surprise Attack

If the killer surprises a creature and hits it with an attack during the first round of combat, the target takes an extra 14 (4d6) damage from the attack.

Actions

Multiattack

The killer makes three melee attacks.

Shortsword

Melee Weapon Attack: +7 to hit, reach 5 ft., one target Hit: 7 (1d6+4) piercing damage. If the target is a creature other than an undead or a construct, it must succeed on a DC 14 Constitution saving throw or lose 5 (1d10) hit points at the start of each of its turns due to a bleeding wound. Each time the killer hits the wounded target with this attack, the damage dealt by the wound increases by 5 (1d10). Any creature can take an action to stanch the wound with a successful DC 14 Wisdom (Medicine) check. The wound also closes if the target receives magical healing.