When DotA 2 was ported over from DotA, Storm Spirit was a one of a kind hero. But in 2013, Valve released Ember Spirit and Earth Spirit and introduced them as the Spirit Brothers.
This update should also bring us patch 7.30 which will again, completely turn the game upside-down. Judging from their previous patch releases, we can expect the update to come in late October to mid November of this year.
We’ve already seen artificial cleverness systems trounce humans at the historic game Go, and today computers are earning at multiplayer video gaming too – the OpenAI engine supported by Elon Musk has been beating the best Dota 2 players in the world championships in America.