[Gameplay] Sejuani W

In a Mid-late ranked game while playing Sejuani my W skill had stopped working. I would activate the skill, it would go on cd and consume mana but that is all it would do. I am uncertain when it happened but this was my build when I noticed it. Cinderhulk, ionia boots of lucidity, warmogs armor and aegis of the legion. Before the game ended I sold all my items one by one to see if my W would work again but that came to no avail. So I would have to assume something occurred in the middle of a team fight. I'm not sure what else I can add so I suppose I'll leave it at that.