No crafting recipe found in this mod's data. It may be obtained through gameplay mechanics not yet documented here.
Crafting using Dragonforge Ice Brick, Dragonforge Ice Brick, Dragonforge Ice Brick, Dragonforge Ice Brick, Ice Dragon Heart, Dragonforge Ice Brick, Dragonforge Ice Brick, Dragonforge Ice Brick and Dragonforge Ice Brick, arranged in the pattern shown. Produces Dragonforge Ice Core.
Crafting 
Crafting using Ice Dragon Heart and Paper, in any arrangement. Produces Banner Pattern.
Crafting ⇆ any arrangement 
Banner Pattern guaranteed
iceandfire:ice_dragon_hearticeandfireiceandfireiceandfire:items/dragon_hearts