Thornmail

Thornmail is an advanced item in League of Legends. It is best obtained on tanks when the other team has high physical damage DPS. Magic damage returned by Thornmail is calculated before damage reduction from armor. This means you can be taking less damage than Thornmail is returning. 

Recipe

 * (300g)
 * (700g)
 * 1000g

Trivia

 * It is one of the few items mentioned in the games tutorial.
 * Magic damage returned by Thornmail is calculated before damage reduction from armor. This means you can be taking less damage than Thornmail is returning.