The Great Flood

This spell can't be countered.
If you own Noah, God-favored and Noah's ark
phase them out.
Destroy all nonland permanents, they cannot be regenerated.
Every living thing that moved on land perished birds,
livestock, wild animals, all the creatures that swarm
over the earth, and all mankind. Everything on
dry land that had the breath of life in its nostrils died.
Genesis 7:21-22