Magic: The Gathering: Ice Age Cycle Series by Jeff Grubb

After the war comes the darkness.Terisiare lies in ruins. Nations have fallen, goblins raid the land, and an oppressive faith throttles the city-states. Now deep within the walls of the Conclave of Mages, Jodah must decide if unlocking his own immense power is worth taking a step into the dark lands.The epic of the Ice Age begins.

After the darkness comes the ice Thousands of years after the explosion at Argoth that ended the Brothers' War, ice has covered the world of Dominaria. The strong have turned to barbarism. The weak have died. Now Lim Dul, a necromancer with a taste for power, seeks to awaken a deeper evil.

After the ice comes the peril The Ice Age has come to an abrupt end, but the world's troubles have not. Legions of undead still plague the living. The temporary peace in Kjeldor has come to an end, and an evil far more treacherous than Lim Dul has been unleashed upon the land. The ice has gone, but the evil remains.