Which credit cards use only the trans union credit report for their cc applications?

this knowledge may help me save part of my universe>:D

I'm not sure how you would find that out?

I doubt that a Credit Card Company is going to tell you which specific credit bureau they view regarding issuing credit.

I believe that they all use a combined report, which uses all three bureaus to compile a specific scoring based upon their own model.

Good Luck with that!