Everfrost

Create a batch of ice that can't be broken or melted by physical or magical damage if made a weapon or used to attack will do 2 d10 of ice damage it can be bound to a willing character's life force by dropping a bit of blood it can be melted by hellfire created by any infernal being or radiant damage will cut the connection if the ever-frost and allow it to be damaged for a d20 amount of time before the connection comes back and the ice hardens again