Grez

Grez The Lizard Lord is a neutral monster in League of Legends described in game as "A melee monster with large amounts of health. Killing this foe grants a slowing attack that deals damage over time.". It only spawns on Twisted Treeline, in the center of the map with no other monsters around it.

When killed, Grez grants his killer the buff, where every hit deals bonus true damage (3 x Champion Level damage per second, ticks 3 times) and slows enemies (10 / 20 / 30% for melee, 5 / 10 / 15% for ranged).

Trivia

 * He was named after the player Grez, who was the first to refer over 10000 referrals.
 * Grez the Lizard Lord is the Twisted Treeline' counterpart of the of Summoner's Rift. Although they grant the same buff, Grez is significantly stronger.