Climate Change

This card cannot be destroyed.
Wait 5 turns. On the 6th turn, destroy all
creature and token cards with toughness
of 1 or less. On the 7th turn, destroy all
creatures with 2 or less. Keep doing this
until all creatures are destroyed.
This card gets sacrificed when there
are no creature or token cards on the battle field.
"We told you this was going to happen"