Formula 86

Strive - This spell costs {2}{b} more to cast for each target beyond the first.
Destroy any number of target creatures. They
can't be regenerated. For each creature destroyed
this way, its controller puts a 1/1 black Rat
creature token onto the battlefield.
This spell costs {2} less to cast if you control a creature named Sanspoof, Cat Burglar or
Sanspoof, Bestemors Kosegull.