The Final Hours

Flash, Uncounterable
For the specified number of Hour tokens on The
Moon, do the following:
24 Hour tokens—Counter target spell.
48 Hour tokens—Tap all lands, for every
four lands tapped, destroy target permanent.
72 Hour tokens—All nonland cards that aren't
exiled or in the graveyard are shuffled into their
owner's library.
Remove all Hour tokens from The Moon.