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 - $10.70
Lightly Played - $9.70
Moderately Played - $8.60
Heavily Played - $7.50
Damaged - $5.40
NM-Mint Non English - $10.70
Lightly Played Non English - $9.70
Moderately Played Non English - $8.60
Heavily Played Non English - $7.50
Damaged Non English - $5.40