A portable tank with Mob essence taken from the Mob Grinder also shown.
Mob Essence (MFR) is a greenish colored liquid produced by the Grinder (MFR) that can then be Consumed in an Auto-Spawner to create specific mobs. It is also used to Auto Enchant items with an Auto-Enchanter.
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How to process mob essence to spawn any mob capturable with a Safari Net File:Tekkit Lite - Tutorial - Automatic Mega Minefactory Reloaded Mob Farm MK2
Automating Essence Berries in the B-Team Modpack