This landmine cannot trigger by an entity nor a non piloted block. My idea would be that if a heavytank would stumble/hit it. It would make the tank unmovable as the tracks would get broken. It would have a stun effect of 15-20 seconds where it could not move until the track is "fixed." It would be made using the same type of placement of items like a bomb bay bomb but instead of tnt it would need 16 gunpowder and normal iron or steel. It would be balanced by not being able to get placed in movecraft sieges order for not making a wall of them and there would be a slimefun item which could locate mines by giving them glowing effect. It could be disabled by right clicking for a sertain period of like about 3-5 seconds. You can place it only once in a chunk and a 1-2 chunk distance you can place another. Why? It is the only fighting chance of infantry to fight it and gives a new reason to use tanks in warfare.