Freljord Assassin Concept

I'm coming up with a concept for a Freljordian Assassin.

So far, I've come up with a pretty unique scheme for him. Every couple seconds, at the moment 15, he leaves a sculpture made of Ice of where he is. The sculptures can be destroyed by enemy champions, but by him as well. Sculptures he damages, dish out damage and snare nearby enemies, but are not destroyed.

One ability that I have in mind, allows him to dash a short distance, leaving a sculpture where he is, but the distance increases if he dashes to another sculpture. This would proc the sculptures damage and cc.

The idea I have, is that he excels with extended battles, or really well set up fights.

Can I hear some of your thoughts or ideas to add?