mythweaver
infinite loop-Ashaya, Soul of the Wild into Mythweaver Poq
I've had a couple of instants of this loop occurring but with most times it either lead to the game ending with the opponent conceding or ending in a draw. With this last time it happened I had a Soul Warden, 2 Pridemate tokens, and an Ajani, Resolute against an Ashaya, a Mythweaver, and a Tireless Provisioner and with the loop going we both lost all of our extended time and even Arena was showing the warning of ending the loop or the game would end in a draw but it just wouldn't. So I don't know if me adding to the stack changed anything or if an update changed it but Landfall infinite looping is either a draw or continues till one player leaves.
Small and possibly simplest fix is making Mythweaver trigger the first time one or more lands enter a turn, thus making it where it doesn't loop if it enters as a land while still doing the exact same thing for the most part.