3 Yennefer’s illusion at once? How?

Hey all, quick question cuz I’m discombobulated 😕

How does someone play 3 Yennefer’s illusion back to back to back? The managed to wipe my side of the board early R3 and had 30 points.

Few details that could help🤷🏾‍♂️:

They went for heavy assimilate in R1, with operator to tons of imperial practitioners and duchess informant, then Braathens & Vigo.

They over committed to win R1, passed R2 then wiped me in R3. I’m currently trying out a thinning tactic NG deck, so once they blitzed my defender, and helga, there was no point fighting on with Syanna and Skellen.

Any insight into this would be very helpful!!!