Aspect Of Noxious Ice can only be used by the Rogue class. In Diablo 4, the strength of affixes are randomly generated within a range of values. This is shown in [parenthesis] in tooltip above.

Players can select upgrades to the Ice Shards skill via a number of upgrades. The first modifier is a single option, Enhanced Ice Shards, which states: Ice Shards have a 15% chance to ricochet to ...