My opponent had a large board state with over 40 life and nearly 20 creatures on board. I had the above combo in the title assembled, and needed to loop mox opal many times to get enough trampling power to win. I was eventually warned to take a different game action, so I used retrofitter foundry to advance my board, but still the game drew after a few more loops. Based on the timing, I think it may have actually been the 3 prowess triggers I was getting per loop?