Not just that, it let's you target Cantrips with Cantrips.

This allows all the standard counterspelling(counter-cantripping?), magic reflecting and cursebreaking fun of a changeling larping their favorite wizard, but also allows some really screwy effects like using the Chronos power "Set in Stone" to delay the expiration of an effect(Which can get out of hand if the player is able to stack a large number of beneficial cantrip effects that are normally balanced around expiring in an hour or so).