Transmutation
Level: Cleric 6, Druid 6, Sorcerer 6, Wizard 6, Urban Druid 6
Components: V, S, DF
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature/level, no two of which can be more than 30 ft. apart
Duration: 1 minute/level
Saving Throw: Will negates (harmless)
Spell Resistance: Yes
Mass bear’s endurance works like bear’s endurance, except that it affects multiple creatures.
Source: Player’s Handbook (Page 203)