Earth Scorcher

Flying, Migrate (At the beginning of your end step;
if another player has more untapped land than you,
that player gains control of Earth Scorcher.)
{t},{r}: Tap all land opponent controls. (Activate
this ability only any time you could cast a sorcery.)
Whenever Earth Scorcher migrates, you may deal
1 damage to opponent for every mountain you
control.
"Burn it until it's unrecognizable."