Abilities need to be judged

So I am going through this guy Ventus's abilities trying to match up to his parents. I think I've hit a good balance between both but I need to make sure that he's not too OP with that last ability I've given him. I am posting the weaknesses and his battle style along with this because both would be changed if I am forced to change the abilities, and they may help you to decide whether he is overpowered or not.

Take into consideration that this guy is 3/4 icewing and 1/4 firewing. So far I have decided to have Tulvir passing on his physical attributes and none of his fire attributes. So in theory Ventus is all icewing though his scales are orangey red with blue tips. So is everything below this okay?

Special Abilities:
Ventus can breath a column of ice that can slow any non firewing or non firewing hybrid opponents movements to three quarters of their average speed. While he cannot freeze these dragons solid this ability serves its purpose in slowing the dragons down enough so that he can attack or flee depending on the situation. This breath was given to him by his fathers icewing hybrid blood.

Ventus can also shoot small mouth sized sharp icicles from his throat and mouth to impale opponents should they not be fast enough to dodge the attack. This icicles are great for long range attacks, whereas his ice breath does not shoot farther than fifty feet. This attack was given to Ventus by his mothers icewing blood.

(This last one I'm not sure about)
Lastly, Ventus can actually meld into ice and pass through it or stay within it without being harmed. He also does no damage to the ice, rather just slips through it like a wraith might. He can sense where he is within the ice so that he does not get lost. While this is not an offensive attack, being able to hide inside a glacier away from a horribly strong opponent is a great way to not get killed. This defense is the unique ability of Ventus.

Weaknesses: Physically Ventus is not as strong as his mother or father since he acquires both of their speed and stamina. Fire is a big weakness to ice. He could get easily burned just from sitting in a place too hot for his own body. Being three quarters icewing, Ventus can be killed by flames despite being a quarter firewing. This is somewhat annoying as Ventus lives with his father in the firewing tribe where fire and heat make his life relatively miserable. Water is not too much of a problem for the young dragon. Ventus can swim but warm oceans are problematic and give him hot flashes. Lightning is a problem as well since being hit with a bolt would super heat his body. Ventus would probably get badly burnt by a lightning bolt. Both light and dark powers wielded by lightwings and nightwings do equal damage to the mostly icewing dragon.

Combat Style: Ventus will use all of his abilities while fighting, but will use different strategies against different dragons. For example, if he is paired up with a dragon faster than he is on land or air then he would try to use his ice breath to slow down his opponent. However because his opponent is faster there's a high chance that Vinny's attacks will miss. He won't start attacking with his spear-like tail, teeth, or claws until he knows he can land a hit on the other dragon.

Now if he's set up against a dragon of equal speed or slower than he is Ventus might forgo using his ice breath entirely. Instead he would use tooth and claw against his opponent. His tail would be used like a lance and his small icicle bolts explained above would be used here as well.

In either case if he can't beat an opponent and knows it Ventus will try to run or hide. While he lives in the fire tribe there is no place for him to hide within the fire or lava of the volcanoes, but if he is near water or ice he would be able to hide within them. Though he can't hold his breath for a quarter as long as most all of the seawings. So after about ten minutes he would have to surface for air again.

This seems nice to me. A nice set of abilities that don't end up overpowered but just strong with the right mind