The tower has a 10% chance on hit to drastically lower the body temperature of its targets, slowing them by 40%, reducing their health regeneration by 60% and spell resistance by 20%. Lasts 5 seconds.
6 bounces at 10-20% chance means you will get 1-2 every shot, sometimes getting lucky and getting 3 or 4, but isn't as effective against bosses. Clear intended purpose, clear drawbacks, it's good.