Dragonspine

{t}: Add one mana of any color. Activate only as
long as Dragonspine is a land.
As long as Dragonspine is your active plane, creatures
you control without an elemental
damage type have Cryo. (The elemental damage
types are Anemo, Geo, Electro, Dendro, Hydro, Pyro,
Cryo. Creatures with Cryo put a Cryo element
counter onto creatures when they deal damage, then
check for elemental reactions.)