As far as I know classic magic doesn’t fit the games theme of long lost technology found and recovered by us.
But we all know Arthur C. Clarke’s 3rd law:
There is a way around this. The game Gothic had runes which looked a bit like crystals with a symbol in them. They could be equipped and used like tools or weapons, but instead of hitting a rock or repairing a machine they cast a spell.
I can see this system be a perfect fit for Boundless, since it fits right into the current game’s systems and doesn’t need any new UI or buttons. It also doesn’t make us magical beings. Runes could just be another tool to build and equip. Crafted in an alchemy-like way like potions or forging ingredients with a final step in the compactor.
They can also have limited durability like bombs.
They can be sold …
They can be … forged … (takes cover)