Yeenoghu grants special abilities to his cultists. His most devoted followers gain the Gnashing Jaws action and the Rampage bonus action, while cult leaders gain the Aura of Bloodthirst trait.
Gnashing Jaws
Melee Weapon Attack: bonus to hit equal to this creature's proficiency bonus plus its Strength modifier, reach 5 ft., one target. Hit: 1d4 + this creature's Strength modifier piercing damage.
Rampage
When this creature reduces a creature to 0 hit points with a melee attack on its turn, it can take a bonus action to move up to half its speed and make one Gnashing Jaws attack.
Aura of Bloodthirst
If this creature isn't incapacitated, any creature that has Rampage can make its Gnashing Jaws attack as a bonus action while within 10 feet of this creature.