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 - $11.30
Lightly Played - $10.20
Moderately Played - $9.10
Heavily Played - $7.90
Damaged - $5.70
NM-Mint Non English - $11.30
Lightly Played Non English - $10.20
Moderately Played Non English - $9.10
Heavily Played Non English - $7.90
Damaged Non English - $5.70