Is this thread still alive?
Well, I would want a spell that creates a wall (similar to dota's wall of replica) but made from not very big ice blocks (freezing breath, or frostbite in dota). When a unit passes or stays very close to the wall it is caught in a block of ice for X seconds. After the block of ice melts the unit is slowed for 1.5 seconds. If in 1.5 seconds it doesn't leave the wall's area of effect it is frozen again. And so on... Lasts X seconds.
No need for icons or tooltips, I'll chose my own.
I'd like it in JASS. Attachment systems (if you use) doesn't matter. MUI if possible. Levels of ability could be 3 or 4.