well this modpack makes minecraft truly hard. including the hardcore darkness mod the epic siege mod include tinkers construct for balancing purposes. hardcore darkness makes it so if the block is not in range of a light source it has a light level of zero. the epic siege mod allows mobs to break blocks create tunnels ect. tinkers construct allows you to create tools and if you dont now what tinkers construct is look at the wiki i cant think a good way of explaining it. oh and a word of warning this pack is not for people who are new to minecraft.

