Hand of Baron

Exalted with Baron Nashor is a buff available only on Summoner's Rift. The buff can be identified by swirling violet runes around the champion. lol The buff grants:
 * Up to 40 ability power
 * Up to 40 attack damage
 * 3% of your maximum health in health regeneration per 5 sec.
 * 1% of your maximum mana in mana regeneration per 5 sec.

Due to the large boost this buff gives, it can often turn the tide of a match. It can also put the team who has the buff in favor when poking around a turret as they have high amounts of regeneration while the other team does not.

Notice that Runic Affinity doesn't affect this buff's duration.

How to get

 * On Summoner's Rift, by killing the (from which its name is derived). After Baron Nashor is slain, the buff is given to all living players on the team.
 * Unlike most other monster buffs, this buff is not transferrable: the buff is lost when a champion carrying it is killed.

Trivia

 * This buff's in-game icon is the same as the one used for.
 * The name Nashor is an anagram and derived from a similar neutral monster in DotA named Roshan.
 * The name of the ability may be a reference to world of warcraft's reputation system, at maximum reputation with a faction you are considered exalted with