At the beginning of your upkeep, sacrifice Koskun Falls unless you tap an untapped creature you control. Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.
NM-Mint - $9.60
Lightly Played - $9.10
Moderately Played - $8.60
Heavily Played - $7.70
Damaged - $6.30
NM-Mint Non English - $9.60
Lightly Played Non English - $9.10
Moderately Played Non English - $8.60
Heavily Played Non English - $7.70
Damaged Non English - $6.30