We traded with aliens for magic tools. When they failed our civilization crashed - all the way back to blacksmiths and crossbows. But exposure to the alien tech has bred a generation that can weave metaspace, that can become "wizards" - the psionic tech support we always needed.
We have two choices:
1. We can do it all again the hard way, rebuilding civilization slowly with no alien magic
2. Or some of us can learn to be wizards