German Teller Mine
(http://www.105th.org/basic_gear/engineer/german/graphics/teller3.jpg)
Soviet TM-46
(http://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/TM-46_AP-mine.JPEG/1280px-TM-46_AP-mine.JPEG)
American M15 Mine
(http://www.inertord.com/images/mineinfo/m15.jpg)
We need more traps in the game! So I suggest anti-tank mines that do heavy damage in 2 hex radius. Of course they should be expensive, expensive to craft, or maybe even dropped in dungeon loot. As for current traps, IMO they're ok. The mine can use a little damage boost. Also that they're a little expensive to craft and making current traps buyable from heart merchant would be awesome.