Dota 2/Naix the Lifestealer

Lifestealer is a melee strength hero who can be played as a jungler and a carry. His abilities make him very durable, able to go toe to toe with other tanky heroes and shrug off spells. His Rage is just one of the spells that makes him so hard to kill. It not only makes him immune to magic, but also lets him outdamage his foes. His Feast and Open Wounds both leeach life from his enemy to heal himself. Feast is active at all times letting him keep his health up while attacking. Open Wounds will cripple an enemy hero while he and his teammates leech all of its health. He can catch entire groups of enemies by surprise with Infest, popping out of an ally or enemy and proceed to lay waste to the enemy team.

Rage
Rage makes you magic immune while granting you increased attack speed. It is a great self-buff ability, useful for ganking or for survival during teamfights. The increased attack speed will help you shred enemy heroes, while the magic immunity ensures that you don't get disabled or damaged by abilities while you focus on your target.
 * Ability: No Target
 * Attack Speed Bonus: 30 / 45 / 60 / 80
 * Duration: 3 / 4 / 5 / 6
 * Mana Cost: 75
 * Cooldown: 19

Feast
Feast makes you heal a portion of the current health of the unit you are attacking, dealing the restored hp as bonus damage. It can make you very difficult to kill, especially when against other strength heroes with high hp, letting you do more damage and heal more the higher the hp that unit has. Note that the heal and bonus damage depends on the unit's current hp, so if the unit has low health, you won't do as much damage or heal as much.
 * Ability: Passive
 * Life Leech: 4% / 5% / 6% / 7%

Open Wounds
Open Wounds will slow the target while giving all allies lifesteal for that target, including damage from spells. The target will slowly regain move speed as time passes. It is a great ability that can cripple en enemy's chance to escape. The strong slow will make it hard for them to run away while the lifesteal makes it harder to fight back. You can also cast it on important enemy heroes during teamfight so your team has a better chance of taking down that target.
 * Ability: Target Unit
 * Affects: Enemy Heroes
 * Range: 200 / 300 / 400 / 500
 * Life Leech: 15% / 20% / 25% / 30%
 * Max Slow: 70%
 * Duration: 8
 * Mana Cost: 110
 * Cooldown: 24 / 20 / 16 / 12

Infest
Infest makes you burrow into an enemy creep or any allied unit, which you can subsequently use Consume to burst out of, dealing damage in an area around you. You will also be healed for the current hp of the unit if you emerged from an enemy creep. If the unit you're infesting dies, you will instantly emerge from it. It can be a great initiation tool by infesting a unit as it moves into enemy territory then bursting out of it as your teammates arrive. There's also the "Naix Bomb", which involves infesting a mobile or invisible ally like Riki or Storm Spirit, then making that hero deliver you to the enemy to catch them off guard. In can also be used to play mindgames with your opponents. Just Infest an enemy creep that is among a large group and watch your enemies panicking as they try to figure out which creep you infested.
 * Ability: Target Unit
 * Damage Type: Magical
 * Damage Radius: 700
 * Damage: 150 / 275 / 400
 * Mana Cost: 50
 * Cooldown: 100

Consume
Makes you burst out of the infested target, killing it instantly if it's an enemy creep.
 * Ability: No Target