It was presented as one option for Step Six in this Seven Step model for vocabulary introduction, which is designed to take less than 3 minutes per word and be usable for any subject. The instructor didn't really give it a name but she did use the word "ping-pong" and it involved a sentence frame kinda thing so we'll go with that.
Ping Pong Sentence Frames
1. Teacher provides some kind of sentence frame. We were practicing with "transform," and she used the frame, "A __________ can transform into a __________."
2. Teacher sets a one-minute timer, and starts: "A caterpillar can transform into a butterfly."
3. Designated student gives their own version, "A tadpole can transform into a frog." Teacher & student continue, giving as many examples as possible in one minute.
"A bad student can transform into a good student."
"A bad teacher can transform into a good teacher."
"An ice cube can transform into a puddle."
"An egg can transform into a chicken."
etc. They don't really have to even be true, so long as they follow the pattern and make SOME kind of sense.
The next day, I tried it with my kids. I didn't time us (mistake- the urgency would have helped) and I didn't make it one versus one. Instead, I took answers from anyone who was ready. Some classes got into it more than others, but it totally got in reps and we had fun.
___________ contra _____________ bellum gerit.
Americans contra British bellum gerit.
Trump contra Hilary bellum gerit.
Japanese contra Americans bellum gerit.
America contra terrorism bellum gerit.
We also did some with servat: Superman Lois Lane servat. Spiderman "that ginger" servat. Batman his parents NON servat. Tom Brady Patriots servat. etc.
And some with vincit: Patriots Falcons vincit. Trump Hilary vincit. amor omnia vincit (okay, that was mine). etc.
It was a good way to kill a few minutes and get some nice contextual reps in of some new terms. All in all, totally worth adding to the toolbox.