onEvent.custom({
    "type": "iceandfire:dragonforge",
     "dragon_type": "fire",
     "cook_time": 1000,
     "input": {
      "tag": "forge:ingots/iron"
     },
     "blood": {
       "item": "iceandfire:fire_dragon_blood"
    },
    "result": {
      "item": "iceandfire:dragonsteel_fire_ingot"
    }
})