Black Diamonds are the real money (or P2P) currency in the game. It is nearly impossible to get Black Diamonds for free, but there are often free gifts and events that give coupons for price reduction.
Other black diamond events (like 100% Rebate and Westeros Trade Fair) can give 'Rebate
| Endurance • Motivation • Stamina — Black Diamond • Blue Diamond — Grain • Gold Dragons • Iron • Stone • Wood |