Oh I see! I thought The Magician would grant your cards AoE damage, my bad. I'll go for an other run rn and see how far I can get :) But no way to pickup those objects on the floor i assume?
Edit: got to 5 minutes but mobs also stopped spawning :( Are there supposed to be more and different enemies than only the goblins? It still seems pretty easy, I think the movement buff card and the player's own move speed need some tweaking. You can easily outrun all mobs if you really try to.