Is there a Minecraft mod that lets you battle mobs in creative mode?

I love playing on both creative and survival modes on minecraft, but I want to kind of combine both. Is there any mod that lets mobs actually attack you on creative mode?

As far as I know, there isn't, and I know a lot of mods!

I know that if you played Creative Mode on the peaceful difficulty all enemy entities will not spawn. Any difficulty other than Peaceful will allow enemy entities to spawn.

There's no mod for that. However, by using command blocks, you can easily shift game modes with a lever or pressure plate.