Echoing Annihilation

Choose a card type other than land.
Each player reveals their hand, then exiles all cards they own of the chosen type from their hand, graveyard and from the battlefield. Create an X/X Colorless Nightmare creature token, where X is the total number of cards exiled in this way.
The Annihilation Pulse did not merely destroy flesh. It tore apart the fabric of the Aether, wounding the plane at the most fundamental level.