Clever impersonator and Garruk Relentless
During Arena cube my opponent copied my Garruk Relentless with their Clever Impersonator. They used the ability to garruk to kill my creature which did 2 damage to garruk, making it flip. I had a removal spell in my hand and it give me priority to use it. I didnt and the prompt came up again. The prompt to let is resolve keep happening infinity forcing me to use the removal to keep playing the game
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Rezzahan#77802
commented
Garruk Relentless has a state trigger. So long as its trigger is on the stack, it won't trigger again. When the trigger leaves the stack, it will retrigger right away if the condition is still true. This is how all state triggers work. The "problem" here is, that the Clever Impersonator CANNOT transform, since it is not a transforming double faced card. Copying one does not change that. (The rules are different for token copies.) So the state trigger condition remains true, and it retriggers, again, and again, and again. This is a mandatory loop and would cause a draw in paper Magic.
Arena should be able to recognize the mandatory loop and make the game a draw. Though it should allow for outside-the-loop interactions first.