Best Toxic Minecraft Servers

This pack is absolutely brimming with nostalgia mods. There have been some updates and additions as well.
Big hit mods:

Botany
Buildcrafts
Thaumcraft 4
AE2
Mechanism Community Edition
Tinker’s Construct
IC2
Aroma Mining World (For all your quarrying needs)

From the official curseforge page:

“Roguelike Adventures and Dungeons 2 is an official spiritual successor of well-known Roguelike Adventures and Dungeons modpack inspired by many RPG, roguelike, roguelite and dungeon-delving games and modpacks. It’s an exploration based modpack with over 250 mods, 100+ new biomes, 12+ dimensions and dozens of new dungeons to delve and loot, ground or flying structures to find and bosses to fight. Level up skills; find new better equipment, relics or trinkets; build and decorate your base and go exploring to find a lot of new interesting! Everyone can find something for themselves in this modpack. Progressive difficulty and scaling mobs with different attributes forces you to always be in shape in terms of equipment and skill. There are also a lot of option to gain more health to compensate.”

This is the offical Edge of Infinity modded minecraft server! This world is very rarely reset making for a good long-term gameplay server. This modpack is based around magic and adventuring featuring mods like Bewitchment, DivineRPG, Ice and Fire, MKUltra, Weather2, Botania, Thaumcraft, and many more.

Rebirth of the Night modpack hosted by Aberrant Winds! Come join the terror and excitement of one of the most heavily modified modpacks around.

“Inspired by Terraria, 7 Days to Die, and more, Rebirth of the Night is a Minecraft 1.12.2 modpack with its own progression system, lore, mechanics, and art. It’s built with the idea of remembering the central themes of what made Minecraft enjoyable and expanding them in every way, increasing the overall risk and reward as you progress.”