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.
Near Mint - £8.10
Lightly Played - £6.90
Moderately Played - £5.70
Heavily Played - £4.00
Damaged - £2.40
Near Mint Non English - £8.10
Lightly Played Non English - £6.90
Moderately Played Non English - £5.70
Heavily Played Non English - £4.00
Damaged Non English - £2.40