Curse of Yeenogu

A curse given by gnolls to victims. 

The infected humanoid develops a mild allergy to silver and wolfsbane, even when in their base form. This manifests in becoming itchy when touching it and developing a rash or blisters after longer exposure.
 

Embracing and Fighting the Curse

 The gnoll pack leader can howl causing the infected to listen to them, the infected must roll a dc 13 wis save in order to fight the pack leader’s control

Terror of the Man.

When you take a long rest, you must succeed a DC 10 Constitution saving throw or become transformed into hybrid form at a random point during the rest, attacking the nearest available creature a minimum of 3 turns if able. Your actions and bonus actions must be used for melee attacks against other creatures if able during those turns, and attempting to transform back afterwards must also succeed a DC 10 Constitution saving throw. This does not use your limited transformations, and you still gain all the benefits of a long rest if you resume your rest before 30 minutes past. In order to remember the events of this transformation, you must succeed a DC 10 Wisdom saving throw, otherwise you have no recollection of these events.

Reversion and Embrace

You may attempt to become cured or embrace the curse of lycanthropy. 

• Cure: The curse lasts until removed by remove curse or a similar effect. If you do, you no longer gain any of the effects of this feat, however if you gain it genetically then the only way to remove it is with a Wish Spell.
• Embrace:
• Each long rest due to Terror of the Man, you may attempt to gain more control over your transformations by making a DC 10 Constitution Check.
• Each long rest you kill creature(s) while transformed due to Terror of the Man, gain a -1 modifier that attempt to the Constitution Check in attempts to control the beast, it resets at the start of dawn.
• If you succeed in an accumulative total of 5 Constitution Checks when you attempt to control the beast, you automatically succeed on saving throws for the Terror of the Man feature except on full moon, in which case you have advantage on the saving throw. 
• Hybrid Form:
• Multiattack. Can make two attacks with claws, or one bite and one claw

Bite Melee Weapon Attack: 1d8 + Str Mod + Proficiency Bonus to hit, reach 5 ft., one target. Hit: (1d8 + Str Mod + Prof Bonus) piercing damage. If the target is a humanoid, it must succeed on a DC 12 Constitution saving throw or be cursed with Hyena lycanthropy.

Claws. Melee Weapon Attack: 1d8 + Str Mod + Proficiency Bonus to hit, reach 5 ft., one creature. Hit: (1d8 + Str Mod+ Prof Bonus) slashing damage.

[Add 1 d8 at level 6 and additional at level 10]

Can only communicate in broken, guttural speech

Pack Tactics. The hyena has advantage on an attack roll against a creature if at least one of the Hyena's allies is within 5 feet of the creature and the ally isn't incapacitated.

Keen Hearing and Smell. Have advantage on Wisdom (Perception) checks that rely on hearing or smell.

 The NPC or PC that is infected gains 3 points in strength for added muscle mass and they grow in size becoming a large being.

Move speed becomes 45 feet