Dr. Mundo resists the first Immobilizing effect that hits him, instead losing Health and dropping a chemical cannister nearby. Dr. Mundo can pick it up by walking over it, restoring Health and reducing this Ability's Cooldown.

Dr. Mundo also has significantly increased Health regeneration.

Dr. Mundo hurls his bonesaw, dealing % current Health magic damage to the first enemy hit and Slowing them by % for seconds.

If the bonesaw hits a champion or monster, Dr. Mundo restores Health. If it hits a non-champion or non-monster, Dr. Mundo instead restores Health.

Dr. Mundo charges up a defibrilator, dealing magic damage each second for up to seconds to nearby enemies. Additionally he stores of damage taken for the first seconds and % for the remaining duration as gray health and can Recast.

Recast: Detonate the defibrilator, dealing magic damage to nearby enemies. If this hits at least one champion, Dr. Mundo restores % of gray health, otherwise he instead restores % of gray health.

Passive: Dr Mundo gains Attack Damage.

Active: Dr Mundo violently swings his "medical" bag, causing his next Attack to deal an additional physical damage, increased by up to based on his missing Health. If the enemy is killed, Mundo swats them away, dealing physical damage to enemies they pass through.

Dr. Mundo pumps himself with chemicals, gaining % of his missing Health as max Health, % Move Speed, and regenerating % max Health over seconds.

At Rank 3, both healing effects are increased by an additional % per nearby enemy champion.