The venerable Lord Kroak was the first of the Slann mage-priests to be spawned upon the world, the eldest of the first generation Slann. It was Kroak amongst all the Slann, the most powerful race of wizards the entire world has ever known, who had the greatest control over magic. It is said that the mysterious Old One Tepok taught Kroak how to draw upon the winds of magic, and that the serene Potec showed him how to unravel those same winds. It is even written that Kroak taught the ancestors of the High Elves the magic they wield to this day, in the golden age of Ulthuan before the Elves wrote down their histories. In his lifetime, Kroak has witnessed the rise and fall of countless civilizations, entire races blooming and fading into extinction. Lord Kroak was present at the birth of the world as it is seen today and it is said he is fated to endure until the last moment of time itself, when the continents will burn and the earth is consumed.
During the Great Catastrophe Lord Kroak made the most profound of sacrifices; charged with the defense of Itza, the first city, Kroak knew that the fate of creation itself was hanging in the balance and so mustered his defenses. Tapping into the collapsing web of magical energy, Kroak erected an enclosing force field of incomprehensible power around the city. The enraged daemonic horde battered against the force field for days on end, expiring even as they clawed at the crackling magical dome. But eventually even Kroak could not hold the mystic wall no longer, and with a final, thunderous surge of power he forced the barrier outwards, leveling the jungle for miles all around, banishing a million daemons in an instant. Without the barrier to stop them the screaming masses of chaos swarmed into the first city.