Board Thread:Questions and Answers/@comment-162.25.24.153-20150728133516/@comment-5693502-20150729004754

Well Shinsoo can converted into almost anything with enough skill. So a shinsoo user (with enough skill, aptitude or inherent affinity) could potentially convert the shinsoo they're controlling into any element they desire.

SIU has stated that converting shinsoo into an is difficult (although certain people find it easier than others).