Cataclysm

Target player sacrifices all lands they control
unless they pay half their life, rounded down.
Target player sacrifices all creatures they control
unless they pay half their life, rounded down.
—
In days when arcane magicks ripped apart the ancient
sky; And mighty tyrants ruled with sorcery and steel;
Where vast barbaric hordes rode out on cursed battlefields; And spilled each others' blood with chaos
in their hearts