The cosmic event is rolled for at the beginning of any one friendly Magic phase, and its effects last until the beginning of the next friendly Magic Phase. On a 2D6 roll of 3+, Tetto'Eko's calculations are correct and the cosmic event occurs. All spells from the Lore of Heavens will be cast with irresistible force on any successful casting roll that includes a double, provided it is not miscast. If 2 is rolled, the Chaos Moon has corrupted Tetto'eko's calculations and all spells cast by the enemy will benefit from the above effect instead.