Vladislav rein Kosygin is a Russian professional player who plays the role of a full support. His main heroes are Silencer, Treant Protector, and Vengerful Spirit. 

rein started his professional career since 2017 for different little-known mixes. He managed to earn his first prize money only in 2022, then he together with cybermos NonTeachable team managed to take 3rd place at Russian eSports Championship 2022. 

Also rein together with www stack reached the final of KFC Games 2022, then moved to YNGBLD, with whom he took the top 8 in Dota 2 Champions League Season 15. Already in the next season of this tournament he played for Sigma.YNT. 

On September 13, 2023, he became a player of SIBE Team. During this time he managed to achieve top 4 at European Pro League Season 12 & 13 and 5-8 place at Pinnacle Cup: Malta Vibes #3 and #4.

In March 2024, rein joined One Move. Throughout the year, the team unsuccessfully tried to qualify for tournaments, including Elite League 2024, DreamLeague Season 23, PGL Wallachia, but failed to make it to any of them. The attempts to participate in the two main events of the year - Riyadh Masters and The International - were also unsuccessful. After failing in the qualifiers, the team competed in the CCT Dota 2 Series 1 and LEON.BET MASTERS #1, where they finished in fifth and fifteenth place respectively.

In July 2024, Vladislav temporarily joined Virtus Pro to participate in the Clavision Snow Ruyi Invitational, and then returned to One Move. In January 2025, VP rented rein again. After that, Vlad returned to play for OneMove, representing the team at CCT Dota 2 Series 7 and FISSURE Universe Ep.4. In March 2025, he officially joined Virtus.pro.

On May 16, 2025, Virtus.pro failed to qualify for FISSURE Universe: Episode 5, losing to Avulus in the lower bracket final of FISSURE Universe: Episode 5 Play-In.

On May 21, the team withdrew from the Eastern Europe closed qualifier for The International 2025, as the match dates overlap with the Riyadh Masters 2025 qualifiers. Most likely, they plan to play in a different region at different dates. At PGL Wallachia Season 5 Virtus.pro was one of the first teams to be eliminated.

In July 2025, Virtus.pro ended their participation in Riyadh Masters 2025, finishing in 13th place and earning $50,000 in prize money.

On July 27, 2025, Virtus.pro secured a spot at FISSURE Universe: Episode 6 by defeating Avulus in the upper bracket final of the FISSURE Universe: Episode 6 Play-In.

On September 17, he joined the new VP.CIS roster, but due to poor results, the team was disbanded and all players were placed on the transfer list. In December, rein joined the 1WIN Team.

In March, 1Win Team placed 5-6 at DreamLeague Season 3 Division 2, and later finished 2 at CCT Season 2 Series 8, losing to paiN Gaming 0:3.

Two months later, the team received an invitation to DreamLeague Division 2 Season 4, where they came close to qualifying for the main tournament. Shortly after that, the roster competed at the “home” online tournament 1W ESSENCE I, finishing in 2nd place.

Notably, in the first round of the playoffs, 1win Team defeated one of the tournament favorites Tundra Esports.