What effect do neutral buffs have in League of Legends?

Question

I know it is desired to get the blue buff for Ability Power (AP)-base champions and the red buff for Attack Damage (AD)-base champions and baron buff is good for everybody. I think blue buff at least increases your mana regeneration and red buff your health regeneration. So far I don't have any experience with maps (and therefore its buffs) other than Summoners Rift - I would like to know about these too.

What do the buffs affect in detail (preferring concrete numbers)?

Answer

Summoners Rift buffs:

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Lizard (red) buff

Blessing of the Lizard Elder

• This unit's physical attacks slow the target's movement speed by (10/20/30)% (at levels 1/6/11)
• Deal (7.7 + Level * 2.35) true damage based on their level.

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Golem (blue) buff

Crest of the Ancient Golem

• Regens 1.5% mana (or energy) per second
• (16 + Level*0.5)% cooldown reduction on their abilities.

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Both red and blue last for 2:30 minutes without utility masteries. 2:52 for level 1 and 3:15 for level 2

If slain, both buffs transfer to the killer.

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Nashor buff

Exalted with Baron Nashor

• 40 ability power
• 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.

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Lasts for 4 minutes regardless of utility masteries.

If slain, the buff is lost.

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Twisted Treeline buffs:

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Lizard (red) buff (~ Same as on Summoners Rift)

Blessing of the Lizard Elder

• This unit's physical attacks slow the target's movement speed by (10/20/30)% (at levels 1/6/11)
• Deal (7.7 + Level * 2.35) true damage based on their level.

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Lasts for 2:30 minutes without utility masteries. 2:52 for level 1 and 3:15 for level 2

If slain, buff is transferred to the killer.

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Ghast (black/grey) buff

Crest of Flowing Water

• Increases Move Speed by 30%

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Wolf (green) buff

Crest of Nature's Fury

• Increases attack speed by 20%
• Reduces cooldowns by 10%.

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The black and green buffs last for 1:00 minutes without utility masteries. 1:09 for level 1 and 1:18 for level 2

If slain, the black and green buffs are transferred to the killer.

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Dragon (brown) buff

Crest of Crushing Wrath

• Increases the damage dealt by champions by a 1% per champion level on basic attacks and skills.

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Lasts for 2:00 minutes without utility masteries. 2:18 for level 1 and 2:36 for level 2

If slain, the buff is lost.

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Crystal Scar (Dominion) Buffs:

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Shrines

• When walking over shrines, the player gains a 30% movement buff.

These areas are neutral, so both teams can utilise them.

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Lesser Relics

• These are scattered around the map and grant the player an instant burst of health and mana. (I am yet to find the actual numbers)

These areas are neutral, so both teams can utilise them.

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Greater Relic / Storm Shield

This buff spawns at the middle of the map and is team specific (one for each side). The buff grants a single champion the following:

• A shield of 400 health that recharges with time
• Increase the damage of the Champion's abilities every few seconds (I am yet to find the actual numbers)

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