Forge

Found while traversing realms, the forge is identified by a hammer on the realm map and allows you to do two things: infuse and forge.

Infusing
You can infuse items into other items. This is the primary purpose of tech, to be infused into your other items. The tech gets sacrificed in the process and is a one time use, but provides the item with a significant buff.

You can also infuse any normal items into any other item except tech (tech cannot be leveled up). The items being infused will give some XP. Remember, once an item levels up, it gains an increase in certain stats. This can be great in the later realms to get rid of all your trash items and infuse them into the items you like.

Higher rarity items require more XP in order to level up. Items give XP based on their value so better items will give more XP. Higher rarity items also have a small boost to the amount of XP given, so infusing an epic item will give more XP than a rare item of the same value.

Forging
A way to re-work items. You supply two items and it forges them together, creating a new item and destroying the other two. The forged item retains 80% of the XP from the other two items. this is outdated. you can now only forge items together if they level the item up. tech is the exception.