The Fall of Nyx

Exile all creatures, artifacts, and enchantments. Exile all cards in graveyards and libraries. Each player chooses 5 cards they own in exile and shuffles them into their library. Each player chooses up to 3 legendary permanents they own in exile and puts them onto the battlefield. Exile this spell.
Elspeth finally wrought her vengeance. Theros will never be the same.