Wither Storm Enhanced is a simple challenge modpack based around Cracker's Wither Storm, with performance improvements, shaders and a couple extra mods. To preserve the challenge, the only mod that changes vanilla content is the Wither Storm mod - the rest just help the pack run better, with optimisation and visual improvements, in addition to free multiplayer support through e4mc.
My own personal challenge rules are as such, if you'd like to try a similar format.
- Hard difficulty
- You spawn in survival and have the first day to gear up
- On the first sunrise, you must be within the house at 0,0 and summon the Wither Storm
- Then you run like hell