Ordo is a type of magical power found in Thaumcraft 4. It is part of the mod’s Aspects system, which contains primal elements that can be combined to create new aspects and knowledge. Ordo is a type of magical force that can be used to produce vis crystals, which are the currency of Thaumcraft 4. Ordo can be acquired from Ordo sources, which come in several varieties: nodes, crystals, blocks, essentia tubes, and jars. Nodes are found in the world and contain a certain amount of Ordo which can be mined by using a wand. When mined, they will start to refill, allowing players to harvest them multiple times. Crystals can be found in loot bags or generated in special pieces of dimaond ore scattered throughout the world. These are collected by using the wand and contain a large amount of Ordo. Blocks are structures generated in the world, which contain a single Ordo source. They typically contain more Ordo than nodes or crystals, but they respawn less frequently. Essentia Tubes are structures that generate vis crystals. These can be found in dungeons, abandoned villages, and nether fortresses. Jars are generated in dungeon's rooms. They contain a single Ordo source and can be used to craft items. Using Ordo sources, players can collect and craft any number of magical devices and items, from wands to complex thaumaturgical devices. Players can use Ordo sources to gain access to powerful aspects, or to craft items of rarity not found anywhere else in the game. Ultimately, Ordo sources are a big part of Thaumcraft 4 and will help you reach a higher level of magical power.