Like some trophies, completing these Overwatch challenges can happen more randomly than actually trying. My first run with Baptiste happened to be in Competitive Play, so I took what I learned in the practice range mode and let loose in really important matches. The challenge is to “prevent 4 deaths with a single use of Baptiste’s Immortality Field in Quick or Competitive play.” Seems somewhat easy? I think an enemy that pops their ult with multi-kills as a possibility is the best way to acquire this trophy.
This enemy D.Va decided to panic ult because most of my team was situated for an attack move. Most of us were doomed as heroes with no shields, so I plopped that Immortality Field around 5 of us just to see if we live. We did. The field device was gone, but we all survived. The trophy notification popped, and that’s when I remembered Overwatch trophies are much cooler to get without trying too hard. I haven’t given Baptiste a solid run of gameplay aside from a few matches, but I do plan on trying to get the Window of Opportunity trophy someday. :)