Banished

Banished is a modpack that circles around magic, machines, and life underground. The backstory is that you are a mage that experimented in corrupting magic. You succeeded, but the corruption (Taint) got loose. You were then banished to a underground world filled with deadly creatures, little plant life, a basic kit, and minor ability to access spells. You are unable to make nether portals, and the world is made up of multiple biomes, from a dessert to a ice wonderland, one of these biomes also happen to be a nether biome.

As hopeless it may seem, it is possible to survive. You must kill creatures for power (Dark power), and use that power to unlock spells that let let you attack, dig, and grow life. Questing is absolutely necessary to survival at first, and for a little less work later on.

Getting Started
When you first get into the world, you will notice theres no trees to cut down for another pickaxe. There are a few solutions to this problem:
 * 1) Find and kill a Salty Tree (Mob from Lycanites`s Mobs).
 * 2) Hurry and complete the first few quests from the Quest Book, and use some dark power (5) to get your first spell, Dig. Remember: You can obtain Dark Power from killing a selection of mobs that you can find throughout the world. You can claim the quests every 3 hours in-game. This is about 3-4 minutes in real life. After you get the spell, you can dig to your hearts content, and then complete a few more quests to get a sapling, which costs 12 Dark Power, and to grow it quickly, it will need a largish room, light, and your Grow Spells effect (The grow spell can also be acquired from the book.).