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 - $11.60
Lightly Played - $11.00
Moderately Played - $10.40
Heavily Played - $9.30
Damaged - $7.60
NM-Mint Non English - $11.60
Lightly Played Non English - $11.00
Moderately Played Non English - $10.40
Heavily Played Non English - $9.30
Damaged Non English - $7.60