At the beginning of your end step, for each player, put a +1/+1 counter on up to one target creature that player controls. Each creature with one or more counters on it can't attack you or planeswalkers you control unless its controller pays {X}, where X is the number of counters on that creature.
NM-Mint - $3.00
Lightly Played - $2.70
Moderately Played - $2.40
Heavily Played - $2.10
Damaged - $1.50
NM-Mint Non English - $3.00
Lightly Played Non English - $2.70
Moderately Played Non English - $2.40
Heavily Played Non English - $2.10
Damaged Non English - $1.50