Quest for a focus

Im planning on making a quest for a focus for our mage player.

Short description of our group. We are a 2 gamemaster group with always 4 active players, and we planned to make a player specific quest for each player.

But i need help designing the quest for the mage player. I’m planning sending him on a solo adventure started by a vision. But im not really sure how to plan the rest of it. The Player is a Hermetic Mage. If you (the community) have any ideas, please share it with me. Basically i want some kind of Sword to be his Focus.

Btw. We are in a custom Great Britain (Basically less cities and more wilderness)

Br, Martin