Monster Generators are objects found in the dungeons that create a seemingly never-ending supply of monsters.

These sorts of objects existed in Diablo II, most obviously as Blood Hawk nests and the various standing caskets and coffins found in the Act 2 desert tombs, from which endless zombies would emerge.

More gruesomely, the blood pit, see in the image to the right, was the source of a seemingly unending supply of fat zombies that came crawling up over the edge while a player remained nearby. Unlike the Iron Maidens, there was nothing to destroy to stop the zombies from emerging from this pit. Players eventually just had to leave the area when they'd battered enough of the slow zombies to take the edge off.

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