Dr. Mundo regenerates 0.3% of his maximum Health each second.
Q - Infected Cleaver
Dr. Mundo hurls his cleaver, dealing damage equal to a portion of his target's current Health and slowing them for a short time. Dr. Mundo delights in the suffering of others, so he is returned half of the Health cost when he successfully lands a cleaver (increased to the full Health cost on killing blows).
W - Burning Agony
Dr. Mundo drains his Health to reduce the duration of disables and deal continual damage to nearby enemies.
E - Masochism
Masochism deals bonus damage on Dr. Mundo's next basic attack and increases Attack Damage by a flat amount for 5 seconds. In addition, Dr. Mundo also gains an additional amount of Attack Damage for each percentage of Health he is missing.
R - Sadism
Dr. Mundo sacrifices a portion of his Health for increased Movement Speed and drastically increased Health Regeneration.