30th Anniversary Edition

Power Surge

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.

Fourth Edition

During each player's upkeep, Power Surge deals that player 1 damage for each land he or she controls that was untapped at the beginning of the turn, before the untap phase.

Fourth Edition Foreign Black Border

Summer Magic / Edgar

Foreign Black Border

Revised Edition

At the beginning of a player's turn, before the untap phase, the player must take a counter for each of his or her lands that is not tapped. During the player's upkeep, Power Surge does 1 damage to that player for each counter; the counters are then discarded.

Collectors' Edition

Intl. Collectors' Edition

Unlimited Edition

Before untapping lands at the start of a turn, each player takes 1 damage for each land he or she controls but did not tap during the previous turn.