[Q] Use USB tethering and connect as LAN from another device possible?

[HOrobOD]

OK so I have two android devices, a phone and a tablet. My tablet is the new NVIDIA SHIELD Tablet. I have a horrible old slow router, so gamestream doesn't work well. I was wondering if there was some way to use my phone as a router of sorts. My pc doesn't have wifi so I have to use USB tethering. Is there any way to use USB tethering on my phone, and connect to a LAN network via wifi on my table typo to my pc for game streaming, just like through a regular wifi modem? My phone is a Galaxy s4 on AT&T. Both android devices are rooted with stock roms.