Glassing

Destroy all lands target opponent controls.
For each land destroyed this way, target opponent creates a Glass token.(It's an artifact with "{t},
Sacrifice this artifact: Add one mana of any color.")
"You are, all of you, vermin. Cowering in the dirt thinking, what, I wonder? That you might escape the
coming fire? No. Your world will burn until its surface
is but glass!" —The Prophet of Truth