https://worldmetalindex.com/blog/2026-08-09-steelhearts-matijevic-teams-with-ex-in-flames-guitarist-as-the-global-heavy-metal-underground-keeps-buildingWorld Metal Indexen2026-08-09T04:01:12.000ZSteelheart's Matijevic Teams With Ex-In Flames Guitarist as the Global Heavy Metal Underground Keeps Building