I have seen a video of Techies killing Roshan at level 8 with Arcane Boots, Soul Ring etc, in that video he first uses Smoke of Deceit to disappear and then he did that trick.
Is there any connection with the smoke thing and that trick working or not?
41 Answer
Smoke of Deceit (Dust of Appearance is an item that shows invisible units, I always say the wrong thing as well) is a common item to use when going for a Roshan kill.
This is because Roshan can be a huge advantage for a team so the enemy team will generally keep the entrance warded so they can contest Roshan, maybe killing the enemy team or just chasing them away and taking Roshan for themselves.
The thing with Techies killing Roshan does not depend on Smoking to go in, however it is a cheap way of making sure you can't be seen going in so no one will attack you while you're being half killed by an angry monster thing.
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