The World Has Moved On

At the beginning of each player's upkeep that player sacrifices a permanent.
Whenever a land is put into a graveyard from the battlefield, put a desolation counter on The World Has Moved On.
When The World Has Moved On has ten or more desolation counters on it, sacrifice it. If you do, you may destroy up to six target nonland permanents.
When the world crumbles, so do the beams. When the beams crumble, so does The Tower.