I thought I'd toss this out there... the BloodMoon Plug-in from Lumien. I know it's already pretty well-known, but for those who don't know, the plug-in gives a 5% chance that a red moon will rise at night creating MANY more mob spawns and in some cases, stronger mobs. I use it on all of my offline games and actually raise the percentage that a bloodmoon will rise from 5% to 15-20%. It offers a nice challenge and a chance for quick leveling for those brave enough to face those nights head-on. Just a thought. Click link below for YT video of said plug-in in action... Minecraft Mod: Blood Moon - You're Probably Gonna Die!