Krasus sits atop Wyrmrest Temple with his queen, Alexstrasza circa Wrath of the Lich King. Like her, he has assumed a gigantic, elf-like form. Krasus is the name the red dragon Korialstrasz uses when in his high elven guise.
In the Dalaran fountain, [Krasus' Copper Coin] wishes "My prayers go out to my brothers and sisters who still suffer in Grim Batol. I WILL free them."
Before 3.1.0, Krasus (Korialstrasz) had a meager 13,000 health in his dragon form. This paled in comparison to the whopping 13.9 million Alexstrasza has and the fact that he is an ?? elite boss. He now has 11,156,000 health.