Classic Casting is a Thaumcraft 4 addon, which adds back many items and blocks from Thaumcraft 3, which are missing in Thaumcraft 4. This includes all the old wands, the Infusion Altar and some other stuff.
- Thaumcraft 4.2.3.5
- AuraCore
Quote from Azanor: "Lastly, I've noticed some addons adding items from TC 3 or earlier. I don't have a problem with that, so go wild."
(source: Spoiler -> Addon Mods)