The last four IEM Oakland CS:GO teams will be decided at the iBUYPOWER Masters tournament, ESL announced Wednesday.

The tournament will feature a $100,000 prize pool, and the top four teams from the event will qualify for IEM Oakland the next weekend, which is set to have a $300,000 prize pool. Those top four teams will join SK Gaming, Team Liquid, Vritus.pro, Astralis, Ninjas in Pyjamas, G2 Esports, Natus Vincere and mousesports.

"Teaming up with iBUYPOWER Masters allows us to accomplish a long term goal of ours: a LAN qualifier for IEM with prize money for teams and players,” Michal Bilcharz, ESL's VP of Gaming stated in a press release. “This partnership is an important step towards evolving the IEM model and structure that we want to have in the future."

iBUYPOWER Masters will be an eight-team invitational, though the teams have yet to be announced. The tournament will run from Nov. 12-13.

Daniel Rosen is a news editor for theScore esports. You can follow him on Twitter.