Is there any rule against monstrosities speaking to each other?

3 Yes/No questions about Simulacrum after it does a long rest

There seems to be a lack of official support for crafting…

Blinding Smite and Find Steed, does the spell qualify for Find Steed’s spell effect duplication?

You don’t have a background when you first get Expertise as a rogue

How would Extra Attack features work?