Have to chime in on Daeron's Runes.
The reason why they are considered powerful is because they are the very first 100%, auto-include, no-exceptions, play-with-them card (for Lore decks that is).
I have played games without Steward of Gondor, without A Test of Will, but never ever have I played without Daeron's Runes when I had a Lore hero. All other "power" cards have cases where you don't need them, but not so with Daeron's Runes.