The first "Wing" of "Tomb of Sargeras" will be opened on the 8th of June. Bosses will be in a test mode, the loot and achievements, connected with them will be disabled. The cooldown for "The Nighthold" will be one day, for "Tomb of Sargeras" - a week. You can leave your reports on bugs in the "Raid" section on our forum. Also you always can test all bosses on the test realm and leave information about defects.
