What is the Conqueror's Chest in Dragonfire?

The Conqueror's Chest is a premium chest: it only gives Epic and Legendary Relics (no Rares). So it's a high-end source for pushing your best dragons.

Its confirmed quality: reward #1 is 75% Epic / 25% Legendary. You're essentially guaranteed at least an Epic per opening, with a real shot at a Legendary.

Who benefits: if you're building around key Epic or Legendary dragons, the Conqueror's Chest concentrates value exactly where it counts (no "diluting" Rare Relics).

Like all Relics, what you pull out is permanent: an investment that doesn't evaporate at the next Reign.