Imperial Fists Veteran

This spell costs {1} less to cast if you control three
or more Tactical Objective tokens.
Sacrifice a Tactical Objective token: Put a 0/5 colorless Wall creature token with Reach onto the battlefield. If at the end of the combat phase that
token is not destroyed put two Tactical Objective tokens onto the battlefield. At the end of the turn remove that token from the battlefield. This
ability can only be cast during your opponent's
turn.