Couldn't mill opponent with infinite mill combo
Had Putrid Goblin - Thran Vigil - Altar of Dementia combo out, opponent had 250+ card library. I start combo and all the animations take so long that I can only mill about 150 cards (with 2 extra timeout ropes). Opponent takes turn, Back to my turn, I continue combo, can only get opponent down to 20 cards. Can't activate anything on my opponents turn, even though I have priority and available actions. Opponent wins because he manages to exile my win conditions despite having already should lost.
Suggest support for specific infinite loops to be able to repeat x times for a total output that then gets generated to avoid wasting both players time and set up incorrect wins/losses like this one.