Having a magical item is great. Having two was even better. But if you had three... you may not be able to buy another magic item, but Liam however...
You pick up your phone and call Walker who immediately answers.
"Oh thank god you called," his voice cried out from the other end "the Uber driver kicked me out when I-"
"Tell me your credit card number." you interrupt him.
Walker obediently recites the number and you jot it down. "Ok, continue doing what I told you to"
"Wait! My bed sheet got caught in the car door and now I'm-" *click* you hang up on him and turn to Liam still standing eyeing you nervously as he awaits his next command.
"Give me the ring" you order. Liam takes it off his finger and throws it at you. You consider punishing him for his attitude but decide to hold off for now.
"Okay Liam, follow these directions to the magic store and use Walker's account details to buy me a powerful magic item." you command handing him the note "Under no circumstances are you to use this item against me. You are not to tell anyone anything about your current situation or ask for help in freeing you but you may speak to the shop keeper if staying silent would be suspicious."
After a pause when it is clear you have no more instructions Liam gives you one last glare and walks out the door. Now all you have to do is kick back and wait.