Invar ingot - feed the beast wiki - wikia, Production edit. invar ingots are produced by smelting invar blend or invar dust in a furnace. they can also be made in the induction smelter from 2 iron ingots and.Railcraft - feed the beast wiki, Railcraft is a mod which adds many new kinds of minecarts and tracks, as well as improvements to how minecarts work. it shouldn't be confused with the mod traincraft.. Tinkers' construct - feed the beast wiki, The tinkers' construct mod focuses on weapon and tool manufacturing. it introduces different ways of crafting better, faster and stronger equipment..