Shinobi Sabotage

Sacrifice Shinobi Sabotage: Target player taps half of his or her land. Land tapped this way
does not yield mana, neither does it untap on their next untap step.
Reports of shinobi infiltrations are growing by the week, causing, some would say, a bit of a panic
among Soviet and Allied forces unaccustomed to having to defend their forward bases against such an assault.