Your Leviathan server, with the useful bits included.
Host your Leviathan server
Leviathan is available for Minecraft server hosting with CreeperHost.
Leviathan is a Survival-focused adventure/exploration modpack expanding on the framework established by FTB Revelation. This modpack takes FTB Revelation and adds a more robust set of mods that increase players’ capabilities and utility in order to tackle progressively more challenging creatures, bosses, and dimensions in their own preferred manner. The goal is to add something for everyone, no matter the interest or manner of solving problems.
The mods added include additional server/world-based functionality, adventures, cosmetic and quality of life assets, biomes and worldgen options, creatures, tech, magic, farming, animal rearing, and dimensional adventures.
Some specific highlights of additional mods (added on top of Revelation) include the following:
Server/World Functionality:
Nothing at the moment
Adventures:
Nothing at the moment
Biomes & Worldgen:
Biomes O’ Plenty - (Replacing Traverse)
Recurrent Complex
Cosmetic & QoL Assets:
Decocraft2
Chicken Chunks
Minecolonies
Portal Gun
VeinMiner
Magic:
Electrobob's Wizardry
Essential Craft 4 Unofficial
Totemic
Soul Shards: Respawn (Replaces default FTB Revelation Soul Shards)
Tech:
Aetherworks
Armory Expansion
PlusTic
Creatures:
Ender Zoo
Mowzie's Mobs
Ice and Fire: Dragons in a whole new light! (Dimensions and Spawning Heavily Restricted)
Farming / Animal Rearing:
Animania
Minecolonies
Mystical Agriculture
Mystical Aggraditions
Dimensional Adventures:
Abyssalcraft
Aether Legacy - (Aether II When I am satisfied that there aren't gamebreaking bugs.
The Betweenlands
Cavern II
Cloneland
Got questions? 
Yes. CreeperHost modpack pages link into ordering with the selected pack ready to install. You can also change versions or pick another supported pack later from CreeperPanel.
CreeperPanel is built around real modded servers, including update paths that aim to preserve user configuration changes where supported instead of treating every update like a fresh install.
Eco can work for lighter packs, but Premium is the recommended CreeperHost range for modded Minecraft. Premium gives stronger hardware, Turbo Start, Bonus Memory, and Ask Theo where enabled.