About the hero: 

Being raised by humans as a gladiator, Thrall learned more about strategy and tactics as a youth than even experienced orcish warchiefs learned in their lives. After escaping from the human slavery and meeting Grom Hellscream, he found out that he was a descendant of the Frostwolf clan. He traveled to his ancestor's village, where he became familiar with the spiritual magics of the orcish shamans. Now he combines not only his control over  thunder, but also his tactical abilities to turn fights in his favor using impenetrable walls of magic, areas of static energy  and even control over time.

Thrall is an addition to the Sentinel Intelligence heroes. 

Thunder Strike
Thrall curses the target to be struck by thunder 4 times over 6 seconds. Foes nearby the victim will also be damaged.
Manacost:		— 130
Damage Per Strike:		— 40/60/80/100
Secondary AOE:		— 200
Cooldown:		— 12/11/10/9 sec

Note: No damage on windwalkers and no effect at all on magic-immune users.

Note 2: — Your main nuke. The damage is quite hurt and what's more, it's also hurt nearby enemies which make it useful for pushing. You also gain sight on the cursed enemy. 

Note: The glimpse effect has some  travel time, the target isn't instantly moved back.

Note 2:  — This thing really helpful for initiate a gank and prevent escaping enemy. Other cool thing is you can send back an enemy to their fountain if you cast it just after they arrive with Town Portal 

Note 2: — Windwalkers and magic-immune (omni-repel and others) users can walk through your Kinetic Field. 

Note 3: The most annoying thing about Thrall. It's like a big Sprout. Watch out for the delay, if you're miscalculate it, you can let your enemies escape. Combine it with Static Storm for maximum damage.

Note: Duration with Aghanim's Scepter: 7

Note 2: — The damage starts off slow and ramps up continuously until it reaches the max

Note 3: A pretty decent AoE. The drawback is that it needs some time until reach it maximum damage.  Kinetic Field will help you reach that.

If you want advice...

Late game is very dangerous for Thrall. Because he is not a tank and there will be a lot of stronger late game heroes who can kill him in no time. The strategy is always go with your team. Wherever they are, whatever they do. Use your skills to support your team as much as you can. Try to win every team clashes. It's the only way to win the game.
In teamfights, use your skills to benefit your team as much as you can. Trap a whole enemies using kinetic Field then follow with Static Storm and Thunder Strike. If there is an enemy's hero who manage to survive, Glimpse him. The combo can be combined with other heroes skills to be more deadly. Try to survive this phase of the game by not getting pawned.When youre on mid phase of the game, try to push the lane. But again always put a sight on every enemy on the map or you will get ganked easily. If the lane already pushed, there will be some heroes who come to defend. It means chance for gank.
If youre dual laning, always remember to higher your awareness due to early gank.In middle lane, it means you are solo, your role is to get more experience than your enemy. Its easy because of Thunder Strike has a huge nuke damage in early game. If the enemy decided to go back to fountain and TP back to lane, use Glimpse as soon as possible. It will bring him back to fountain and absolutely make him frustated. Always try to harass and kill him. You can go mid solo or dual laning. I prefer dual laning cause he is still fragile and with his teammate they can protect each other. But whatever lane you choose the strategy is still the same. Harass everytime you can and dominate the lane. The different is you will go more supportive to your ally if you choose dual lane. 

Kill them all. We will show no mercy to the opposing team. The fate of the DOTA depends on you!

iCCup.Team