Conjure Abyssal Army

When you finish casting this spell, 4 Dretches appear in unoccupied spaces that you can see within range.

Additionally, the longer the spell remains active, the more creatures are conjured. After 10 minutes, two Babau are summoned. After 20 Minutes, a Vrock is summoned.

The summoned creatures are friendly to you and your companions. Each time a new set of creatures is summoned, roll initiative for them. They obey any verbal commands that you issue them (no action required by you). If you don't issue any commands, they defend themselves from hostile creatures, but otherwise take no actions.

At Higher Levels. When you cast this spell with a spell slot of 5th level or higher, the duration increases by 5 minutes for each spell level above 4th.