What is a suitable reward for an absentee game? [closed]

I am doing a PvP battle-royale-Esque Oneshot fight for my party in 2 days because I can’t be there that day. I have a guy subbing for me to run it.

The victor shall get something, but I’m having trouble trying to decide what.

The party members are all currently level one in our normal campaign- Dragons of Icespire Peak. We started it 3 sessions ago, so they’re getting close to 2.

We are all relatively new to DnD so if it’s easy to understand it’ll help.

What can I give the winner as a somewhat useful personal reward that won’t mess up the campaign too much yet will be worth their time?