How to make the mob execute a command when killed?

Hello, I been using MythicMobs for 2 months now and I really enjoyed it, but I have came across a problem that I need to fix. So what I need to do is make the mob give an item to the player who have spawned the mob using the egg

I have tried doing: "- command{c="mm items give @Owner Test} ~onDeath" However, it didn't work...