How to borrow heroes in the AFK Arena?

I'm curious to know, how exactly does one go about borrowing heroes in the AFK Arena? Is there a specific process or set of steps that players need to follow in order to successfully borrow a hero from another player? And what are the benefits of doing so? Additionally, are there any limitations or restrictions on who can borrow heroes and how often this can be done? I'd appreciate any insights or clarification you can provide on this topic.