Summon Erodaemon

Conjuration (Summoning) [evil]
Level: Cleric */Oracle * 8, Sorcerer */Wizard * 8, Summoner * 6, Warlock * 8
Components: V, S, F (a bent or tarnished wedding band)
Casting Time: 1 round
Range: close (25 ft. + 5 ft./2 levels)
Effect: one summoned creature
Duration: 1 round/level (D)
Saving Throw: None
Spell Resistance: no

This spell functions like summon monster, except it summons a single erodaemon.