A Legend 5 Invoker replay analysis by Cookie (7.19).
Rijad originally calibrated at 1k MMR when playing with a friend. When his friend quit Dota, he decided to git gud and in 1.5 years he was able to reach 5k MMR. Nowadays he is 6k and spends a lot of time making guides and educational streams on Youtube and Twitch.
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D2 Bowie's analytical video about Sumail's Invoker gameplay. Bowie talks about winning the late game with an emphasis on utilizing Cataclysm. (7.19d)