Intensifies Viper's venom, adding an effect to his normal attack that slows attack and movement speed while dealing damage over time. Poison Attack is a Unique Attack Modifier, and does not stack with other Unique Attack Modifiers.
Nethertoxin causes Viper's normal attack to deal bonus damage to units based on how much health they are missing. The bonus damage doubles for each 20% of health missing from the target. Nethertoxin deals half damage to creeps and buildings.
Viper exudes an infectious toxin that damages and slows any enemy that damages it in a 1400 radius. The acid exudate also increases Viper's resistance to magic.
Viper slows the targeted enemy unit's movement and attack speed while also dealing poison damage over time. The slowing effect reduces over the duration of the poison. Upgradable by Aghanim's Scepter.
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