This spell does not have a direct equivalent in vanilla.
Monster Summoning VIII
Level: 8
School: Conjuration
Range: Medium
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.
15th : 2 Umber Hulks
17th+ : 3 Umber Hulks
Umber Hulk (8 Hit Dice):
STR 20, DEX 13, CON 18, INT 11, WIS 11, CHA 9; AL Neutral
HP 96, AC 2, THAC0 6, Saving Throws 10/12/12/14/12
3 Attacks Per Round, 1d8+11 Slashing & Piercing Damage (Claws & Bite +3)
Combat Abilities:
Confusing Gaze
Special Qualities:
Immune to confusion effects