Sumeru Desert

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