Constantin Valdor
Constantin Valdor was the original Captain-General of the Legio Custodes. Well known as one of the greatest warriors in the Imperium, to the point where "can he take a Primarch in a fight" is a question taken seriously both in and out of universe. If Malcador was the Emperor's right-hand man, Valdor was his left hand.
History
Unification Wars
Not much is known about Valdor's origins. It is stated that the Emperor spent a lot of time and effort searching for him, suggesting he was somehow special even before his transformation into a Custodes. Although widely believed to be the first of his kind, Valdor himself isn't sure if he was the Emperor's first creation, or merely the first one that actually survived.
Great Crusade
Horus Heresy
Post-Heresy
Eventually Valdor disappeared, leaving behind only his Apollonian Spear. Perhaps he saw how all the Primarchs were doing the "disappear mysteriously so people can spread legends about you returning for the final battle" shtick, and didn't want to be left out.
King in Yellow?
On Tabletop
| Points | WS | BS | S | T | W | I | A | Ld | Sv |
|---|---|---|---|---|---|---|---|---|---|
| 275 | 7 | 5 | 5 | 5 | 5 | 6 | 5 | 10 | 2+/4++ |