Hostile Havoc

This mod makes it where every mob wants to attack you! 
And they have insane knockback!

The knock back is customisable through commands.

Commands:
/mobknockback <value> – Sets the horizontal knockback strength when a mob hits a player. Supports decimals, e.g. /mobknockback 5.5.
/mobknockback get – Shows the currently configured horizontal knockback strength.
/mobknockbackheight <value> – Sets the vertical/height multiplier of the knockback. Supports decimals.
/mobknockbackheight get – Shows the currently configured vertical knockback multiplier.

This mod may only be needed on server side, but is recommened on client as well.