Viper is a ranged character. His primary attribute is agility. The hero is mainly taken as a midlaner. Most effective in the early and mid game.
A very dangerous opponent in the early game thanks to the Poison Attack ability, which allows him to gain complete dominance over the enemy, and with the purchase of Aghanim's Shard, it will help the hero demolish buildings faster. The Nethertoxin AoE ability is a dangerous spell for enemies that rely on their passive abilities. Thanks to Corrosive Skin, attacks on Viper at close range will also damage the enemy. Aghanim's Scepter grants the Nosedive ability, which is useful against melee heroes.The Viper Strike ultimate not only damages the enemy, but also weakens and slows him down, and with the purchase of Aghanim's Scepter the spell can be cast more often and at a greater distance.
Viper was curiously glad to have been sprung from the sealed and unchanging subterranean Nether Reaches. Viper spent some time hoping to learn dark magic, obeying the orders of the wizard, but he soon realized that his toxins were just as deadly as the dark spells. Viper escaped from captivity, spat poison in the old spellcaster's eyes, and soared out to let the world know that it had a new master.