I have been killing zombies for 3 days - I earned enough exp just by killing zombies to bring Deugan from level 12 to level 14 - and I still have no Trilobite key from them!! Great game, though. I have keys 1 and 4, and I don't want to go into the Catacombs until I get the key from the zombies. I'll keep whacking away at zombies until one of them drops it, I guess.
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