Dota 2/Dazzle the Shadow Priest

Dazzle is a ranged intelligence hero who is usually played as a support. He has a great array of spells that lets him heal and strengthen his teammates or weaken his enemies, though he needs more exp than most supports to be truly effective. Dazzle's signature ability is Shadow Grave, which lets him effectively render an ally unkillable for 5 seconds, but that's not all Dazzle can do. He can keep his allies healed up with Shadow Wave, which also lets him push creep waves and do AoE damage. His Poison Touch inflicts a variety of status ailments, making it a great disable. Dazzle is also a good initiator, if not a bit frail. His Weave will detract armor from enemies and increase armor for his allies, making his team stronger as time passes. With a good selection of abilities and great teamfight presence, Dazzle is a hero to watch out for.

Poison Touch
Poison Touch applies a debuff on the target while mini-stunning on contact. The afflicted unit will take damage over time and be slowed, getting slowed even more (66%) after a second on level 2 and getting stunned for 1 second at the 3rd second on levels 3 and 4. It starts out as a standard slow, but as it levels up it becomes a formidable disable. The slows and stun is great for catching up to enemies while the damage over time, which lasts after the stun, can help finish them off. The mini-stun at the start is also helpful for interrupting channeled abilities.
 * Ability: Target Unit
 * Affects: Enemy Heroes
 * Damage Type: Physical
 * Damage: 8 / 16 / 24 / 32
 * Set Time: 1 / 2 / 3 / 3
 * Slow: 33%
 * Duration: 8 / 9 / 10 / 10
 * Mana Cost: 100 / 115 / 130 / 145
 * Cooldown: 15 / 13 / 11 / 7

Shallow Grave
Shallow Grave applies a visible buff on the targeted hero, making them unable to be killed no matter how low their hp is for the duration of the buff. It effectively makes the target invincible for 5 seconds, letting them survive tough skirmishes or flee to safety. The range on it is pretty poor on level 1, being even less than your attack range, but once it reaches higher levels you can cast it on allies in need from a safe distance. There is one thing that can kill through Shadow Grave. As Axe's Culling Blade removes buffs before it hits, it can kill a hero with Shadow Grave if their health is low enough.
 * Ability: Target Unit
 * Affects: Allied Heroes
 * Duration: 5
 * Range: 400 / 600 / 800 / 1000
 * Mana Cost: 140 / 130 / 120 / 110
 * Cooldown: 60 / 45 / 30 / 15

Shadow Wave
Shadow Wave heals the targeted unit and jumps to nearby allies as well as healing Dazzle himself. It also deals damage equivalent to the heal in an area around the healed units. It is an excellent harassment and pushing tool, letting you damage opposing heroes and creeps near grouped up allied creeps. Since the damage increases with each ally healed, having a bunch of allies grouped together can do a lot of damage to an enemy. The heal itself is also excellent for keeping a bunch of teammates alive during a teamfight, especially since the ability has such a low cooldown.
 * Ability: Target Unit
 * Affects: Allied Heroes
 * Damage Type: Physical
 * Damage: 80 / 100 / 120 / 140
 * Damage Radius: 185
 * Targets: 3 / 3 / 4 / 5
 * Mana Cost: 80 / 90 / 100 / 110
 * Cooldown: 12 / 10 / 8 / 6

Weave
Weave places a buff on all allied units and a debuff on all enemy units caught in the targeted area. The buff gives 1 bonus armor to an affected ally for each second while taking away 1 armor from an affected enemy every second. At level 3 you can have a staggering 24 armor gain/loss, making it deadly in teamfights. If possible, try to use it just before a teamfight starts, as the power of the spell gradually increases, your teammates should get a slight advantage at the start of the teamfight, which will slowly increase as the teamfight reaches its peak.
 * Ability: Target Point
 * Radius: 575
 * Duration: 12 / 18 / 24
 * Mana Cost: 100
 * Cooldown: 40
 * Scepter Radius: 775
 * Scepter Duration: 18 / 24 / 30

Aghanim's Scepter can be bought by Dazzle and will increase Weave's radius and duration.