"Remove their power, and their will to fight will follow."
—Tolarian wizard

Mystery Booster 2

Mana Short

Tap all lands target player controls and that player loses all unspent mana.

Tap all lands target player controls and empty his or her mana pool.

Mana Short empties target player's mana pool and taps that player's lands.

All opponent's lands are tapped, and opponent's mana pool is emptied. Opponent takes no damage from unspent mana.

All opponent's lands are tapped, and opponent's mana pool is emptied.