Power Surge

{R}{R} · Enchantment

At the beginning of each player's upkeep, this enchantment deals X damage to that player, where X is the number of untapped lands they controlled at the beginning of this turn.

Motor: se resuelve a mano

Rulings (1)

This card knows how many were untapped even if it was not on the battlefield at the beginning of the turn.
Wizards of the Coast · 2004-10-04