The lightning and frost damage currently only inflict slowness as a debuff. Both dragonborn breath elements need to inflict damage and have a new effect associated with it to better represent the effect to the p[layer. Examples:
-shiver with the frost slowness
-spark particles wit the lightning stun

The frost effect sets the players freezing ticks to the point of taking damage, meaning they will get all the effects of being in powdered snow for the duration of the effect. The lighting effect stuns the player for a moment. It removes all movement, but its duration is only slightly longer than a second.