I'm not sure what you mean by "dota u9". Could you please provide more context or clarify your question? Here are a few possibilities:

1. If you're asking about Dota 2 and U9 (possibly referring to a player or team), I'd need more information.

2. It could be a typo for something else related to Dota 2 or another game.

3. U9 might refer to a specific in-game item or feature, but I'm not familiar with that exact term in the context of Dota 2.

If you can rephrase your question or provide more details, I'll do my best to help you with the information you're looking for.