- All raids introduced before Patch 3.2.0 will use 10-player mode for the former normal mode (10 man raids) or 25-player mode for the the former heroic mode (25 man raids).
- All newer raids begining with the Crusaders' Coliseum can use the 10-player heroic mode and 25-player heroic mode settings to access harder versions of the raids, not to be confused with hard mode events /actions within the same raids.
Warlords of Draenor
This section concerns content related to Warlords of Draenor.
The Warlords of Draenor removed Flexible mode, 10-player normal, 10-player heroic, 25-player normal, and 25-player heroic, bringing the six tier levels into four (with the added Mythic mode). Essentially 10-player and 25-player were being merged back into single normal mode which auto-tunes itself between 10-25 players in the way Flexible raids did. The same applies to the heroic versions and even the Raid Finder.
Mythic mode is the newly designed raid tier designed to be a 20-player mode for those that want an absolute challenge.
- Patch 3.2.0 (2009-08-04): Introduced.