Let’s come up with a monster.

I also don't like their abilities, but I don't want summoning to be a Druid ability; let them throw lightning bolts or summon wasps instead. This is an idea for something new. If you're interested, I'll post the full idea in a couple of days!

Added 14 minutes later
And also, the Angel of Death – that's a really cool idea! Only in literature, he looks like a skeleton with wings, and his weapon is a scythe!