At the beginning of each player's upkeep, Power Surge deals X damage to that player, where X is the number of untapped lands they controlled at the beginning of this turn.
NM-Mint - $519.80
Lightly Played - $467.80
Moderately Played - $415.80
Heavily Played - $363.90
Damaged - $259.90
NM-Mint Non English - $519.80
Lightly Played Non English - $467.80
Moderately Played Non English - $415.80
Heavily Played Non English - $363.90
Damaged Non English - $259.90