Who was the First Captain-General?

Which group of custodes set off during the Great Scouring to hunt down traitors?

Contrary to popular belief, not any harlequin can kill a custodian, as this a tall feat to achieve, however powerful harlequins such as the Solitaire or the Troupe Master may actually stand a chance accomplishing this.

A Harlequin can kill a Custodian Guard

"Custodes" (cuh-sto-dees) is a latin word and the plural for "Custos" (Coo-stohs).

Custodian is not the answer we're seeking here

What is the correct way to spell/pronounce "Custodes" in singular form?

Despite suffering an average of 4 custodian deaths a day during the war in the Webway for over 5 years admist the Great Heresy, The Custodians lost 2000/4000 of their deployed troops, that was 2000 in a single day. #GWCANTMATH

the Second battle takes place 12,000 years after the Horus Heresy (post Guilliman revival)

How many Custodians were killed at the SECOND battle of the Lions Gate

Yes contrary to popular belief, it is NOT the Eternity gate, Silver doors guarded by two Galatus Dreadnoughts guard the Emperor's Throneroom, over the door is inscribed "Conservus, Restituere, Revivicarem"

it is likely not what you think.

What Doors stand between the Emperor and the rest of the Galaxy?

Although F has been true in the past, recently a Genstealer Cult was discovered, a group called the "Pauper Princes"

and no, we are not talking about the Dark Cells

What did Terra find underneath the palace?

Although "Achilles" is the English translation of "Achillus", the Dreadnought's pattern is spelled Achillus and thus should be pronounced as such. but hey, I'm not a cop.

What is the correct pronunciation for the name of this Dreadnought?

Amazingly Custodians mounted on the mighty dawneagle Jetbikes can burst straight through solid walls without being thrown off their bikes. (who needs seatbelts? you do, please wear yours.)

A Vertus Praetor can blow through a solid wall with his bike without being dismounted

Allarus Terminator Armour moves as effectively as normal Custodian plate, giving Allarus Custodians an even larger advantage over their Astartes Terminator counterparts. (GW forgot about this though and lowered their movement in 10th ed.)

Custodians in Allarus Terminator Armor are hindered by their armor.

According to a 9th edition Custodes codex excerpt, 6 Custodian Wardens SURVIVED against roughly 10,000+ Tyranids, before the sole survivor of the 6 custodes was rescued by a Marines Malevolent Fleet.

How many Tyranids can 6 Wardens fight off against?

The Blood Games is a hell of a game, The Custodes are constantly seeking ways to secure the palace, and this is usually through the blood games where a custodian at random is tasked with infiltrating the palace and the throneroom, after which he discloses the information on how he did it, so that they may fortify that weakness.

Over the past 10,000 years who has successfully infiltrated the palace the most?

The "Edict of Restraint" was a law placed on the Legio Custodes that prevented them from leaving the palace in force, by the High Lords of Terra, Primarchs, and the Captain-General, so that they could focus on guarding the Emperor. but Roboute Guilliman and Trajann Valoris have since lifted the edict

They were busy oiling each quivering other's abs

Why were the Custodes stuck inside the palace for 10,000+ years?

Not only did the High Lords try to put Constantin on trial, they attempted to form a coup d'état using the last surviving thunder warriors and other regiments of early stage guardsmen, few survived this.

After the Massacre atop Mt. Ararat, the high lords of terra wanted to put Constantin Valdor on Trial, following the Emperor's Departure to Mars, what did the Custodes do?

The Ephoroi are a Shadowy group of Custodes, they deal in covert operations, counter intelligence, infiltration and assassinations, do not be fooled, the 9 foot tall giants are ridiculously light on their feet, and stealthier than their armor makes them appear to be.