Mykhailo "Olsior" Zvieriev is a highly respected and talented member of the Dota 2 community. He started his career as StarCraft and was a former Riot Games employee as a League of Legends caster. His deep knowledge of the game, engaging casting style, and positive attitude have earned him a loyal following and a reputation as one of the best casters and analysts in the industry. "Olsior — one of the best things which happened with Dota 2" — this meme phrase made by fans for his high professionalism and such as respect for his work.

Olsior's casting style is characterized by his ability to break down complex strategies and explain them in a way that is easy for viewers to understand. He is also known for his high-energy casting style, which makes his casts engaging and exciting to watch. Has a deep understanding of Dota 2 and is able to analyze the game from different perspectives, including the drafting phase, team composition, and in-game decision-making.

Olsior is also active in the Dota 2 community as an influencer, streamer, and YouTuber. He is known for his positive attitude, his willingness to engage with fans, and his dedication to improving the esports industry.

Notable events:

The International 2019, 2021

Dota Pro Circuit

The Kuala Lumpur Major

The Bucharest Minor

DreamLeague Season 13

ESL One Germany

DOTA Summit

OGA Dota PIT Minor 2019

ONE Esports Singapore Major 2021

PGL Arlington Major 2022

ESL One Stockholm Major 2022

DreamLeague Season 19

and many others!