Athrom, Lord of His Word

When Ahtrom, Lord of His Word enters the
battlefield and at the start of each upkeep, put
a contested counter on target nonland
permanent an opponent controls. Nonland
permanents with a contested counter have
"{2}, {t}: Sacrifice this permanent.".
At the start of each endstep, each player who
controls a permanent with a contested counter
on it loses 2 life for each permanent they control
with a contested counter.