Unforge the World

Destroy all Lands. Apply these effects for each
Basic Land destroyed this way:
For each Plains, that player loses 1 life.
For each Swamp, that player discards a card.
For each Forest, that player puts a -1/-1
counter on one or more of their creatures.
For each Island, that player taps that many
creatures. They do not untap during their next
untap step.
For each Mountain, that player takes 1 damage.