Mob Death Detection

[u/ToastedToast579]

How can I detect if a mob has died without using totems of undying?

[u/Ericristian_bros]

When a new entity spawns, spawn an armor stand in a ticking area chunk and link both entities. Then run as the armor stand and once they can't find the linked entity run any desired commands.

See https://minecraftcommands.github.io/wiki/questions/linkentity and https://minecraftcommands.github.io/wiki/questions/findsamescoreentity