Well all I can say is that it does not work in Monster 1.1.1. Spawning Blizz with the Auto-spawner(not exact mode) and killing them with the Grinder will result in a loss in mob essence.Dw20. If I'm right, mfr auto spawners by design do not produce mob essense 1 for 1 needed to spawn itself. Blizzes seem to have broken that rule.