Tier 10 Relics
This is a list of the bonuses you will get from the Tier 10 Sigils / Relics / etc ...
Death Knight
Druid
Paladin
Shaman
Fall of the Lich King (10 Players Raid) Achievements

Storming the Citadel (10 player)
Defeat the first four bosses in Icecrown Citadel in 10-player mode.

The Frostwing Halls (10 player)
Defeat the bosses of The Frostwing Halls in Icecrown Citadel in 10-player mode.

The Plagueworks (10 player)
Defeat the bosses of The Plagueworks in Icecrown Citadel in 10-player mode.

The Crimson Hall (10 player)
Defeat the bosses of The Crimson Hall in Icecrown Citadel in 10-player mode.

The Frozen Throne (10 player)
Defeat the Lich King in Icecrown Citadel in 10-player mode.

Fall of the Lich King (10 player)
Defeat every boss in Icecrown Citadel in 10-player mode.

It's a Trap! (10 player)
Survive the Ice Jets in Icecrown Citadel 10-player mode.

Unboned (10 player)
Defeat Lord Marrowgar without anyone taking damage from Bone Cyclone in 10-player mode.

Thirty One (10 player)
Defeat X of Lady Deathwhisper's adds with her bombs and then defeat Lady Deathwhisper in 10-player mode.

I'm on a Boat (10 player)
Claim victory in the Gunship Battle in which every raid member visits the enemy gunship only once in 10-player mode.

I've Gone and Made a Mess (10 player)
Defeat the Deathbringer with fewer than X raid members suffering from Garrote in 10-player mode.

Dances with Oozes (10 player)
Defeat Rotface without exploding any oozes in 10-player mode.

Once Bitten, Twice Shy (10 player)
Defeat the Blood Queen while having been a vampire in 10-player mode.
Icecrown Citadel 5-Man Dungeons Achievements

Icecrown: The Forge of Souls
Defeat the bosses in Icecrown: The Forge of Souls

Icecrown: The Pit of Saron
Defeat the bosses in Icecrown: The Pit of Saron.

Icecrown: The Halls of Reflection
Defeat the bosses in Icecrown: The Halls of Reflection.

I Feel Good
Defeat Bronjahm in The Forge of Souls on Heroic Difficulty without letting him cast his big spell.

Three Faced
Defeat the Devourer of Souls in The Forge of Souls on Heroic Difficulty after having interrupted his big nuke.

Don't Let it Go to Eleven
Defeat Forgemaster Garfrost in The Pit of Saron on Heroic Difficulty before he gets 11 stacks.

Don't Look Up
Clear the hallway before Scourgelord Tyrannus in The Forge of Souls on Heroic Difficulty without anyone taking icicle damage.

We're Not Retreating; We're Advancing in a Different Direction.
Escape from the Lich King in under two hours and eleven seconds.