They're a creature type that brings constant aggression to the table: they want you to be attacking and playing proactively, and they will reward you for it
You can dump an Archon of Cruelty into your grave and resurrect it with Persist
Solitude lets white answer creatures even when shields are down, which makes it one of the most flexible removal tools the color has gained in years
This is admittedly one of the weaker shrines in Commander since you dont usually have to worry about an aggro deck running you over on a multiplayer board
House Stark is a large House, so a few of the characters did not get cards of their own
They read, Whenever an opponent sacrifices a nontoken permanent or discards a permanent card, you may put that card from a graveyard onto the battlefield under your control. That means you can attack in multiple ways, and as long as youre interfering with your opponents hand and board state, youll benefit massively from it