Finding Forge recipes in Mortal Kombat 11 is tricky business. The problem is that all the chests you open in the Krypt by spending Coins may randomly contain the rare Mortal Kombat 11 Forge recipe, but since they are all randomly placed, you can never be sure which chests will contain the recipe.
Crafting list of all recipes
Shinnok Amulet: Enchanted Demon Heart + Skeleton Soul + Necromancer's Eye
Ethereal Armor: Copper Plating + Element of Order + Foundation of Edenic Magic
Kuai Liang's Frost Arsenal: Copper Plating + Kitinn Spit + Unknown
Lynx of noble Kan Makan: copper plating + essence of Edenic magic + element of order
Shinnok's Amulet: Enchanted Dragon's Eye + Enchanted Demon's Heart + Enchanted Gem of Locked Souls
Shadow Ops No-Serial Pistol: Copper Revolver + Copper Plating + Unknown
Lynx from Noble Kan Makan: Stabilized Chaos + Red Spiked Club + Unknown
Transmute Gold: Gold Ore + Gold Ore + Copper Plate
Warriors Barbarian Face: Tarkatan's Distilled Fury + Battle Shabby Helm + Leather Stripes
Game page: Mortal Kombat 11.