Bull's Strength

Transmutation

Core Rulebook
Level: Alchemist 2, antipaladin 2, cleric/oracle 2, druid 2, magus 2, paladin 2, sorcerer/wizard 2, summoner 2
Casting Time: 1 standard action
Components: V, S, M/DF (a few hairs, or a pinch of dung, from a bull)
Range: Touch
Target: Creature touched
Duration: 1 min./level
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)

The subject becomes stronger. The spell grants a +4 enhancement bonus to Strength, adding the usual benefits to melee attack rolls, melee damage rolls, and other uses of the Strength modifier.

Bull's Strength, Mass

Transmutation

Core Rulebook
Level: Cleric/oracle 6, druid 6, magus 6, summoner 4, sorcerer/wizard 6
Range: Close (25 ft. + 5 ft./2 levels)
Targets: One creature/level, no two of which can be more than 30 ft. apart

This spell functions like bull's strength, except that it affects multiple creatures.