D&D 5E what monsters create other monsters

[Shades of Eternity]

Trying to figure something out

So far I got the Deepspawn.

 

[aco175]

Necromancers- bringing forth unwilling servants

Cultists- mostly their leader

Orc moms and dads- mostly fill in any monster there.

Not quite sure on what you are looking for.

 

[overgeeked]

Adventurers.

 

[Helldritch]

Evil Gods:' They open portals to other dimensions to bring monsters to punish the puny mortal for daring to ignore them or to have forgotten to placate them."

Whole pantheons:" Yep l, even good gods can ally themselves with their evil brethren when a rival Pantheon tries to invade/steal their faithful."

Evil Wizard:" Just because it is fun".

Good and neutral wizards:" Because experiences can go awry."

DMs. Because without monsters... And monsters we are lest monsters we become...

 

[J.Quondam]

Several undeads make equal or lesser undeads from their slain victims (eg, shadows, wights, vampires, etc).

 

[grimslade]

Yellow Musk Creepers beget Yellow Musk Zombies. Great Old Master Neogi spawn multiple Neogi. Lycanthropy can turn victims into lycanthropes.

 

[Blue]

Spawn of Kyuss. Just reflavored them as Plague Zombies that were being created by an Oinoloth in a game I run.

 

[the Jester]

The Legion of One, from the 3e Creature Catalogue 2 (IIRC) is a great big goblinoid that spawns tons of minion goblins.

EDIT: Sorry, Creature Collection 2. Misremembered the title. Great book, have used a lot from it.

 

[MechaTarrasque]

In 5e, the Elemental Princes break off pieces of themselves to create new monsters.

In my games, demon lords are the personifications of curses, so any humanoids/beasts/fey NPC's (with the exception of the ranger's pet and the paladin's mount) around the fight are going to turn into gnolls, monstrous minotaurs, giant oozes, driders, wraths or vampires, etc. whenever it seems cinematic unless the PC's can trick the demon lord into hallowed ground.

 

[iserith]

Dungeon Masters.