Quote from Kryptnyt »So is Kaldheim the new name for Valla? Immersturm is a plane from Planechase. I thought they both seemed similarish. Maybe Kaldheim and Valla are otherwise linked in some way by the Immersturm.
Card's not as immediately threatening as Falkenrath Aristocrat but it also provides a little bit of graveyard hate. Not terrible
According to Maro, R&D had to change some of the plane names from Planechase. So it's likely just a name that was rewritten to Kaldheim.