Drip
I liked dimensional shift because it can help him to escape battles if his opponent is stronger than him, it can help him go to certain places if there is an emergency there (this will make him more popular and less dispised) and finally he could teleport back to his dorm after killing to get a perfect alliby and he wont miss the curfew so he will not be suspected.
Radiant soul seems to have the biggest potential in combat. Heart of Ice is the most versatile of the three. And Demensional Rift has the best travel/ life saving capabilities. Radiant soul seems to fit in with his demon energy well. but it would be awesome if he could learn "Blood-Bending" with Heart of Ice.
I really like the ice heart and i have seen what other people have said, and so all of them are almost perfect, i have seen some people say that if moby can make the light effect purple it wouldnât look sus, you could di the same thing with the ice ability, and fot the teleport ability he can say that if he leaves some purple energy on the ground he can teleport back to it.
really l...just those abilities..maybe it is just me but I feel that we don't really have a choice and who knows... hey drip do you have a sneaky move going on here and give u the real ability next chap and it won't be any of these 3 showed...but I personally feel that the light one has major potential