Realm Convergence

A realm convergence happens either when the realms are out of balance with one another (so one realm pulls another into its dimension) or when they are in such a harmonious state that they become temporarily unified (this only occurs in the first cycle of existence).
  During the latter kind of realm convergence, there is no disharmony. Peace is abundant. This is the period during which Tarakom is conceptualized and created, and thus, the realms are split to compensate for the change in the universal order.
  The primary kind of realm convergence occurs usually as a result of great magical power (eg. necromantic ritual) or in the final days of the final cycle of existence, when the realms will collapse upon each other and Tarakom will be destroyed by Taratok.