Blood Moon

If a nonbasic land has an ability that triggers "when" it enters the battlefield, it will lose that ability before it can trigger.

This effect doesn't affect names or supertypes. It won't turn any land into a basic land or remove the legendary supertype from a legendary land, and the lands won't be named "Mountain."

Nonbasic lands will lose any other land types and abilities they had. They will gain the land type Mountain and gain the ability "{T}: Add {R}."