The questions are concerning these two items:
An ancient Dwarf creation, flash powder is used in mines to illuminate darkened fissures in the search for gold and other precious minerals. In Mordheim, small bags of this substance can be used to blind enemies, throwing them into disarray as you launch your attack. Flash Powder can be thrown as and enemy charges the wielder (as an interrupt). The charger must take and immediate Initiative test in order to cover their eyes. If he fails, he is temporarily blinded and it counts as a failed charge. There is only enough flash powder for one use during the battle.
Original used on the battlefield to impede cavalry charges, a caltrop is a small spiked iron ball. In the City of the Damned, a pouch of these small items can be enough to deter any attacker who risks serious injury should they try to charge over them. There are enough caltrops to last for one use only. They may be used when an opponent decides to charge. The defender simply throws the caltrops into the path of his attacker and they reduce his charge range by D6 inches. If this means that the attacker cannot reach his target then it is a failed charge.
The questions are:
Is BS used in any way when throwing these?
Can a warrior with BS0 throw these?
How many chargers do they affect?