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Buffs
From Liquipedia Dota 2 Wiki
Buffs are positive status effects that enhance your hero.
Types of Buffs
[edit]Healing restores a unit's missing hit points.
Invisibility is an effect which hides a unit from sight.
Invulnerability is a status effect that renders the target completely immune to most disables and damage.
Spell Immunity is a buff that prevents the targeting of many spells and grants immunity to magical damage.