The Ancient Golem is a neutral monster in League of Legends described in game as "A tough monster that attacks with slow but punishing blows. Slaying this foe greatly increases mana regeneration and reduces cooldowns." It only appears on Summoner's Rift, where it spawns with two Young Lizards . The Ancient Golem is referred to by most players as the "blue buff", the color of the effect ring you get if you have the buff acquired by killing it.
Imbued by the power of the Nexus, the planet itself rises up to bring forth a protector of its lands. The Stone Golems roam the forests of Summoner's Rift, imbued with the strength of the Nexus and acting against any who disturb the peaceful wake of this isolated battleground.
Jungle monster level is based on the average level of the champions in the game when they spawn (equal to the average of all champion levels, rounded up)
Jungle monster level determines their HP / Damage and XP / Gold value
Killing the Golem and one of its little lizards grants enough experience to go from level 1 (with 0 experience) to level 2 (provided the experience is not shared with allies).
Many jungling paths kill the Golem first due to the large boost in overall speed it gives.
A dedicated Jungle Shaco can kill the Golem at level 1 without using Smite, provided he has at least threeJack in the Boxes stacked before the buff spawns. By immediately heading to red buff and using Smite, a jungling Shaco can acquire both buffs very early in the game, making him one of the most deadly early game gankers.
By saving smite as detailed above, Shaco can also head straight for the enemy red buff to attempt to steal it. Because of Shaco's ridiculously fast blue clear time, many times this results in success.
Ganking at the Golem is common in mid-level or higher play if only the jungler is present. It's recommended to wait until the enemy team has arrived in their lane, or start somewhere else if you're unsure.
Controlling the Golem buffs can give your team an advantage in the match. Most junglers will attempt to control not only their own but also the opposing team's golem buff.
The golem spawn is indicated by a gold marker on the minimap. If your team has vision when or after the golem is killed, the marker will reappear when the camp respawns.
The golem respawns despite the buff still being around, so there can be more than two 'buffed' players active on the map at any given time. The same applies for the Lizard.
The golem buff's duration resets upon transfer to a new champion.
The golem does not respawn if the little lizards are not killed. Use this knowledge to your advantage when determining whether or not to kill the little lizards in the enemy jungle.