This Frostheart Phoenix model was in the displays at Warhammer World.
The Frostheart Phoenix is a creature of pure ice and cold. Its presence on the battlefield chills the air and saps the will of nearby enemies, reducing their combat prowess and turning the momentum of a battle in the High Elves’ favour. Its icy attacks can freeze foes solid, and it offers a powerful counterpoint to the more destructive nature of the Flamespyre Phoenix.
As with many Warhammer models, you have a choice you can either make the kit as a Frostheart Phoenix or Flamespyre Phoenix. They can be made with a High Elf Lord rider.