Playing Ravnica at War, and the left node with the permanent “Eternity” support. My opponent is Ugin. During his turn, my creatures all vanish (first two occurences was when I had 2 creatures on the field).
Three turns later it happens a third time (now I had three creatures). All were gone.
Every time this happened (3 total) I checked my hand, graveyard, and battle log. The creatures are not there. On the log, no mentioning of a card being cast that exiled, destroyed, or Ugin’s 2nd ability being cast. There is no trace of where they went. Ugin did not have my creatures on his side of the board.
I don’t know if anything can be done about this yet. Moreso throwing this out there, so if other players experience something similar they have somewhere to add to.