This spell does not have a direct equivalent in vanilla.
Monster Summoning VII
Duration: 3 turns
Casting Time: 1 round
Area of Effect: Special
Saving Throw: None
By means of this spell, the caster summons a number of monsters, which serve the mage under any conditions. The type and number of creatures that appear depend upon the level of the wizard casting the spell. The summoned creatures will remain under the wizard’s control until they are slain or the spell duration expires.
13th : 2 Otyughs
15th+ : 3 Otyughs
Otyugh (7 Hit Dice):
STR 14, DEX 10, CON 13, INT 5, WIS 12, CHA 5; AL Neutral
HP 70, AC 3, THAC0 10, Saving Throws 10/12/12/14/12
3 Attacks Per Round, 1d6+3 Piercing or Crushing Damage (Bite & Tentacles +3)
Disease: creatures struck moves at half speed and suffer 1 point of damage per round for 1 turn
Immune to disease effects
Slashing, Crushing, & Piercing Resistance 5%; Missile Resistance 100%