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.
Near Mint - $700
Lightly Played - $500
Moderately Played - $500
Heavily Played - $400
Damaged - $400
Near Mint Spanish - $700
Lightly Played Spanish - $500
Moderately Played Spanish - $500
Heavily Played Spanish - $400
Damaged Spanish - $400