Beastland Ferocity (EFA - B)

You touch a willing creature and give it a mixed gift: the ability to fight past the limits of their endurance, but at the cost of not knowing when to stop. The target becomes so tenacious that it doesn’t fall unconscious when reduced to 0 hit points. The target still makes death saving throws, however, and is subject to all the rules covering death saves, including taking damage at 0 hit points.