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From the release:
This month reinforcements for the Legions of the Apocalypse! The Marauders of the Apocalypse are now available for preorder with a very tasty preorder deal: 30 Marauders for 35€, plus the first 200 preorders get for free a new metal Marauder Champion!
If you plan to get the Marauders be sure to make it on the first 200, as 30 miniatures plus metal champion for 35€ is for sure a tasty offer!