Is it really a lot of work to make monsters more 5e?

Imps = Resistance. Add sting attack.
Intellect devourers = Resistance. Add Devour Intellect attack.
Phase Spiders (not Matriarch because she's a unique spider. Homebrew works fine with her) = no Misty Step and remove spitting. Give proper Ethereal Jaunt

Not huge changes.

Last edited by GM4Him; 04/12/21 10:10 PM.