Summon Umbral Servant

Master/shadow calling
Level/School: 7/conjuration (summoning)
Range: close (25 ft. + 5 ft./2 levels)
Effect: one or more summoned creatures, no two of which are more than 30 ft. apart
Duration: 1 round/level (D)
Saving Throw: none
Spell Resistance: no

You summon a creature of shadow to serve you, call it through the barriers between worlds.

This mystery functions like the spell summon monster I, except as noted here. You can summon one Huge, two Large, or four Medium or smaller shadow elementals.