A mod for Noita (https://noitagame.com/) which adds rooms with an anvil into the default biomes, which lets you forge and improve wands!
Or here: http://modwork.shop/25873
Do NOT just download/clone this master branch, it has a lot of crap for developing only and will have lots of bugs!
Where can you find these anvils? They appear randomly in the default biomes (Mines, Coal Pits etc), roughly once per biome, with more in the later ones because they are bigger.
You can throw wands and items by opening your inventory and dragging them out into the gameworld.
Here's a video showing how it works: https://youtu.be/0bQ_mSQb-8E
Here are the current recipes:
The output is based on the stats and rough spell level of the input wand