Warning: This article contains minor spoilers fromHouse of the Dragonseason 1, episode 4.
Before Aegon, however, it belonged to Aenar Targaryen, which we didn’t know.
Daenys had convinced Aenar to leave Valyria before the Doom.

King Viserys Targaryen (Paddy Considine) shows his daughter Rhaenyra (Milly Alcock) the secrets of the catspaw dagger on ‘House of the Dragon.'.Ollie Upton/HBO
The dagger seems to have always been connected to prophecy and pivotal events in the history ofGame of Thrones.
But who was its owner before Aenar?
Viserys tells Rhaenyra, “It is difficult to know.”

Aegon the Conqueror’s prophesy is carved into Viserys’ Valyrian steel dagger.HBO
Martingave to his book series on which the shows are based.
“‘Tis larger than you and your desires.”
The dagger will feature prominently in at least one more crucial moment inHouse of the Dragonseason 1.

Olivia Cooke’s Alicent Hightower holds a familiar-looking Valyrian steel dagger on ‘House of the Dragon.'.HBO Max
Those who have read Martin’sFire and Bloodwill recognize this as the “eye for an eye” scene.
But we won’t get into that now.
The prop maintains the same silhouette, but is glossier and shorter in length.
“Their blades are not made anew.
So all the Valyrian steel is a fixed number of assets in the world.
So they’re going to take care of it.