Is your feature request related to a problem? Please describe.
The horde event often triggers when not wanted, for example you have a lot mobs near you that can not even see you at all, but you accidently step on fire and horde music begins playing. The same thing happens when taking fall damage / getting hit by cactus / fall into lava etc.

Describe the solution you'd like
Check for the damage source when hurt and only trigger the horde event when the damage comes from a mob.

Describe alternatives you've considered
none

Additional context
Also it can be nice to have an option to adjust how many mobs count as a horde.