Hexerei
Zerstöre ein Gebirge deiner Wahl. Die Gipfeleruption fügt dem Beherrscher dieses Lands 3 Schadenspunkte zu.
If the target Mountain is an illegal target when Peak Eruption tries to resolve, it won't resolve and none of its effects will happen. No damage will be dealt. However, if Peak Eruption resolves and the Mountain isn't destroyed (perhaps because it has indestructible), damage will be dealt.