Horde enemies Mend, Abnegation, Anomaly

If you are fighting a Horde type enemy and you have creatures with Abnegation and Anomaly, and if one of your creatures is healed by mend (or maybe any start of turn heal) and that resulting abnegation wipes out the entire enemy team the new enemies won’t spawn. It will be your creature’s turn with no enemy team on the field yet. If you do anything that would target an enemy at this point it’s a crash. The new enemies only appear at the start of your next creature’s turn.